Adviser Vs Advisor – Which Is Correct?

You’ve seen adviser and advisor written both ways, and you wonder which writer got it correct. Are there any differences between both terms? 

Learn the difference between adviser and advisor, and which word North America, Australia, and the UK prefer. You’ll also learn whether to use legal adviser or legal advisor and its synonyms.

Adviser and advisor have the same definition but different spellings. Both nouns refer to someone who advises. But adviser is a more popular term, especially in North America. It’s also less formal than advisor, which often connotes official job titles. 

How to Use “Advisor”

The slight difference between advisor and adviser is that advisor is more common in official titles. Sometimes, it’s just an alternative spelling of adviser, which means a person who offers advice.

The -or suffix has a Latin origin, which you’ll often find in government, academic work, and job titles. The -or suffix is also commonly used alongside verbs with Latin roots. 

Still, the supposed use of advisor as a formal term for a plethora of titles remains an unproven theory. Here are a couple of examples.It is part of what provincial Early Learning Advisor Charles Pascal calls the “seamless day of learning.” [Toronto Star]

[H]e is not necessarily interested in a return to management and may prefer to work more permanently as an advisor. [Telegraph]

Notice how the sentences use advisor in formal contexts. For example, financial advisors are more common in professional titles than financial advisers. The same is valid with academic advisor over academic adviser and national security advisor over national security adviser.

How to Use “Adviser”

There is confusion between adviser and advisor’s use. But you can use adviser the same way you would use advisor. The spelling is just different.

Most publications in the US, the UK, or elsewhere in the English-speaking world use adviser as the preferred spelling. Oxford English Corpus states that adviser appears moreoften. It’s also a more informal term for casual contexts.

Many guides list adviser as the recommended spelling, with advisor being a mere variant. Here are some sentence examples.

A former campaign adviser to President Obama called on top administration officials to fire Energy Secretary Steven Chu. [USA Today]

Schools must do more to engage children who are passively “opting out” of lessons, the government’s adviser on behaviour has warned. [Guardian]

A senior nuclear adviser to the British government says Australia should consider enriching uranium. [Australian]

Both advisor and adviser have English roots as they appear in American English and British English texts starting the 1600s. But experts believe that adviser is more famous because it appeared several years before advisor. 

The two are acceptable choices in any situation. There are no negative implications for using each unless you are required to follow a style guide in your work. 

For the AP style, use adviser. If you’re addressing a person’s company-conferred job title, check the company’s spelling. 

Exceptions On Adviser Vs Advisor

One of the few rules on using advisor versus adviser is to be consistent, especially in proper names and titles in quotations. If your writing mentions adviser, use adviser throughout the text.

For example, a company calls employees who answer financial questions and gives investment advice investment advisers or investment adviser representatives. That means you should stick to the –er suffix. Using investment advisor would be wrong.

A legal term like the Investment Advisers Act of 1940 also requires the correct suffix. This law is also the main reason investment advisers prefer adviser over advisor. They register as an investment adviser even if their company term is advisor.

Outside these regulatory terms, most writers have a preference for adviser. But advisory is still it’s adjectival spelling instead of advisery. The adjectival form of adviser refers to having the power to make recommendations but not to perform action enforcing them.

How to Remember the Difference

There’s no need to remember the difference between the two terms since they have the same meaning. Just observe the consistency in using them in your writing and speech, and take note that the choice of spelling might vary according to industries and companies–for example:

  • Pandemic-related experiences have changed the way academic advisers work.
  • Pandemic-related experiences have changed the way academic advisors work.

Both are correct because academic advisers and academic advisors are used in a general sense.

Adviser and advisor are agent nouns, which indicate that a person is doing something. The agent noun form for read is reader, while dance is for dancer. The natural noun version usually adds –or or -er at the end. Here are some additional examples:

  • Teach, teacher.
  • Employ, employer.
  • Love, lover.
  • Convert, convertor.
  • Drive, driver.

Is it Advisor or Adviser in the UK?

Most writers’ original question in the advisor vs. adviser discourse is which one to use in British English and American English. 

There’s a myth that advisers are only for British English, while advisors are for American English. However, the familiar adviser spelling predominates in both regions. The British English spelling is a matter of choice, although the connotations of adviser are less formal.

Both adviser and advisor are acceptable–for example:

  • You can trust an investment adviser for personalized advice on your investment choices.
  • You can trust an investment advisor for personalized advice on your investment choices.

How do You Spell Adviser in Australia?

There’s also no difference between adviser and advisor in Australia. But the Macquarie Dictionary considers adviser the primary spelling–for example:

  • The boutique investment adviser gives professional advice to clients with deals less than $500 million.

Legal Adviser or Advisor?

Both legal adviser and legal advisor are acceptable terms that refer to someone who gives legal advice. Government officials who are also lawyers can get the title Legal Advisor or Legal Adviser.

What is the Plural of Advisor?

The plural form of advisor is advisors since it’s a regular noun. The same rule applies to adviser, whose plural form is advisers.

Advisor Synonym

  • Counselor.
  • Consultant. 
  • Instructor.
  • Coach.
  • trainer.
  • Mentor.
  • guide.

Adviser and Advisor are the Same

There’s no knockout on the battle of advisor vs. adviser. But based on the strong punches adviser made, the –er suffix wins! The word is more common in North America, Australia, the UK, and other English countries. 

Always be consistent in using adviser or advisor in your speech and writing. Follow the industry spelling if you have to, just like with imposter vs impostor

56 thoughts on “Adviser Vs Advisor – Which Is Correct?”

  1. As a recent federal bureaucrat, in my experience “adviser” is used to describe the role an individual plays as an advice giver, based upon his or her expertise in another capacity -for example, the Council of Economic Advisers.” On the other hand, an “advisor” is a person functioning principally or exclusively in the capacity of providing expert advice,  and who has been named as an advisor as part of his or her job title, as in “Special Advisor to the President for Green Jobs.”

    In these examples, a member of the Council of Economic Advisers would normally function under a different job title altogether but may take a leave of absence or work in both capacities at the same time. An Advisor would normally be dedicated to the role of advice-giving and be answerable directly to the President.

    • So, if you are an expert adviser, you drop the “e” and replace it with an “o?” Is that right? It depends on the frequency and/or the quality of the advice?

      • To me, it’s whether or not the person is paid to do it or not.
        If I tell my son to wear his coat, I’m an adviser.
        If I’m paid to give advice on a particular subject, I’m an advisor.
        I accept that this difference may exist only in my head, but that’s my system.

          • As is mine. My difference, however, is that apart from the odd magazine/periodical article, I’ve never once heard someone offering advice in a non-professional capacity referred to as an “adviser”. Which is what led to my thinking that perhaps the -or spelling was one reserved merely for Universities and other dark places in Academia.

            I’m rather surprised that this article quotes statistics as the US and CA being heavily biased toward -er, when that’s not been my experience. I’ve always associated -or with the title of a person in a position to professionally offer advice, and for a long time, thought it was just the spelling for a University advisor who guides students into career paths and hence courses to take, or one who represents student clubs and organisations. For instance, all throughout undergrad and graduate school, we’re given advisors–this spelling being used BY the institution. (Even now, my spell-check in Firefox is going nuts, as is the one in Gmail, which is what precipitated my hunting down the proper spelling of this word once and for all.)

            So if they’re both accepted words, and I’m assuming this has been the case for more than just the length of a software update, then not everyone is aware of that fact.

        • I’d always thought it was perfunctory versus actual advice. If you’re doing it as a role but not actually providing advice (which is commonly the case with jobs where you check things off), you’re an advisor. E.g. I am an advisor for two student groups on campus, but I don’t offer them any advice at all. I just approve their decisions. If I were an academic adviser, however, I’d use the ‘e’ for it, because they do give advice.

  2. re “five times as common as advisor”

    Something cannot be five times as common as something else, but can be five times more common than something else

      • Let’s turn it around. “One fifth as common” versus “one fifth less common”. Both are actually sound statements, but they mean very different things. “One fifth as common” means 20% of the original… “one fifth less common” means 100%-20% which is the same as 80% of the original. Now applying the same logic to the “five times” case, “five times as common” is the correct usage as intended, as it implies 500% of the original. “Five times more common”, by analogy, would be 100%+500%, or 600% of the original. This is because “more” implies addition (like “less” implies subtraction).

        In other words, your usage is correct, and I believe gram is mistaken.

      • When using a comparator (“more” or “less”), you use “than” to maintain the “more than” or “less than”. In this case you need to use “more common than”. You only use “as” when they are equal “This is as That is” or “This is as common as That.”

    • In math we would interpret “Five times as” to mean 5x, but we would interpret “Five times more” to mean 5x + x = 6x.
      -Math Professor

    • I know this thread is 3 years old, but I’ve only just come across it, and just can’t resist giving a big “LOL” at the person who thinks “five times as common” is not possible.

  3. This one throws me all the time! I’ve always used “advisor,” but it occasionally (like in this text box!) turns up red!

  4. I know it’s all just personal preference, but “adviser” makes me cringe. Imagine if you were to write ‘Docter’ or ‘Professer’…gross right??? The ‘or’ suffix seems, for perhaps arbitrary reasons, far more suitable to professional titles (i.e., doctors, professors, administrators, ADVISORS)…with the exception of certain titles which would just sound clumsy and a bit gross with an ‘or’ suffix (e.g., lawyor…ew).

    • How about TEACHOR, Enginoor/Engineor??

      how about other nouns aside from titles??


      • Okay, you’re right that all the words you listed look ridiculous… but the guy did say it was personal preference.
        Does he really deserve to be shouted down for that?

      • Eh, this does’t seem to be trolling to me. In a way, the examples of Trawna and Eric are in agreement. Both back up the point of the article, namely that the suffix “or” is more often association with professional titles (e.g., doctor, professor, etc.), while “er” denotes everyday activities (e.g., helper, cleaner, etc.). And both versions of adviser/advisor are acceptable, so we’re all right.

      • You will also notice that the examples trawnatroller gives are words directly coming from Latin, whereas the ones you provide are of Germanic origin, or come indirectly from Latin like “pleaser”. “advisor” does come from Latin, and as such I agree with her/him that it sounds better with an “o”…

  5. Not that it really matters, but I differ from most here in that I actually prefer “adviser” to “advisor” for two simple reasons:

    1) The verb from which “adviser” stems is “to advise”. It doesn’t make sense to me to convert verbs that end in e like “advise” into “advisor”(you wouldn’t convert drive into drivor, rule into rulor, or make into makor), except of course for verbs that end in “te” as in translate/translator, or administrate/administrator.)

    2) “Advisor” doesn’t make as much phonetic sense to me. When the letter e follows the letter s, the s is generally rendered as a “z” sound, as in advise, surprise, or laser. But when the letter o follows s, its sounds remains “s”, as in “so”. (Except of course for the blaring exception of the word “visor”, which does nothing to help my case unfortunately.) In short, it’s pronounced “ad-VI-zer” not “ad-VICE-or”.

    As to professional titles, am I just lay-interpreter if I interpret languages for the fun of it, or am I an interpretor if I start doing it for the UN?

    • @d7648df3d786f45edcbfd0abf2d7b605:disqus it does make phonetic sense. Don’t just look at the “o”. The “i” is what contributes to the pronunciation of “s”. Think of words like “Windsor” or “incisor”. Most “-or” words are preceded by voiceless consonants. When it’s voiced or syllabic, on the other hand, it will be the “z” sound.

    • In my view, anyone who gives advice is an “adviser”, whereas one who is employed to advise is an “advisor”.
      Having said that, I also argue there should be a second adjective, “advisory” to be used pertaining to general advice delivered and the term “advisory” used in relation to official advice delivered by an advisor, for example. acting in an advisory position.

  6. As a journalism student, my editors have advised me that “advisor” is nothing but a misspelled word. The spellchecker seems to agree as I type this comment.

      • Certain publications may use their own house style, but the industry standard is the Associated Press Stylebook, which states that “adviser” is the correct spelling to use in all cases.

    • Funny that “Advisor” is American English and “Adviser” is English and that America happens to have about 5 times as many people.

      Google doesn’t report unpaid tax so clearly their reporting isn’t always honest and dignified.

      Yes I’m joking about Google but the fact you’re using a search engine as the decider of the English language is laughable.

      Yes I know your post is a year old but maybe you shouldn’t come up with ridiculous statements if you don’t want to find a response at any point beyond the date the post was made.

      Discussion officially over.

      • The method is not at all laughable. Dave is merely pointing out that, in contrast to the article, it would appear that the “or” spelling is more common than the “er” spelling.

        The article itself, incidentally, quotes an English newspaper, the Telegraph, using the spelling of “advisor”.

  7. I was looking for the answer to this very spelling query and I thank you all for the discussion. Curiously, no-one has mentioned a proclivity for “advisOR” due to the accepted spelling of “supervisOR” (also a position/role/title).

    • “Supervisor”, “divisor” and “incisor” end in “-or” because their noun form ends in “-ion”. (Because, um, Latin.) “Advertiser” and “adviser”, however, don’t have associated “-ion” nouns, so we just stick an “r” on the end of the verb, as we do with most verbs that end in a consonant+”e”, e.g., “produce(r)”, “ride(r)”, “invade(r)”, and so on.

      So “adviser” it clearly must be. Until, that is, someone brings up “advisory”, at which point the whole rather elegant hypothesis crumbles to dust.

  8. Wait a tick…’adviser’ is the more common spelling in the US? Since when? I had NEVER seen it spelled with an ‘e’ before a few months ago. Now it’s all over the place. It’s as if the ‘e’ spelling just sprouted up overnight out of nowhere. I call shenanigans.

    • The power of the Grammarist proven. (Is it only my browser that red underlines that particular site title word as I type :(?! )

      The expert advisers (and their American Advisor cousins) have spoken and the heaving masses have taken their advisory advices. Well done, Grammarists.

      Advisors of the world untie – you have nothing to lose but your Os!

      As a Canadian/British/Australian (and erstwhile American Green Carder – or is that Cardor?) business market-entry adviser do I now need to have my cards reprinted?

  9. Do you own an advisory practice or advisery practice? Exactly. It’s advisor, not adviser, unless you’re referencing the law.

  10. I don’t like adviser, it just looks wrong, and I don’t care about it being the elder version. Advisor is consistent with contributor, coordinator, administrator, etc.

  11. Where do you live? If you live in Great Britain, there’s a high degree of chance that you will always use “adviser”, being that this is the grammatical spelling exclusively taught in that group of countries. If you live in the north American sphere (including Canada, etc.), it seems to me that “advisor” would be more likely as a default – it’s not the only example of an historical US replacement culture which changes the letter “o” for the ‘old world’ “e”. P.S. My valid use of the phrase “more likely” just there gives you a massive clue in solving the ‘non-conundrum’ “as common” versus “more common”. I’ll leave you to work that one out. As a Wikipedia editor, by the way, I would NEVER interfere with the either/or spelling of the word adviser/advisor. It is valid in whichever form it appears.


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