Teeth vs. teethe
Teeth (n.): plural of tooth. Teethe (v.): to grow teeth.
Timpanum, timpani, tympanum, tympani
A kettledrum is a timpanum. Multiple kettledrums are timpani. For senses of the word unrelated to music, tympanum and tympani are the preferred spellings.
Conches vs. conchs
The plural depends on how you pronounce it. If it ends with a k sound, the plural is conchs. If it ends with a ch sound, the plural is conches.
Oxymorons: A Collection of Contradictory Words and Phrases
a rhetorical device in which two contradictory terms are used together for emphasis or poetic effect or to arrive at a unique meaning.
How to Make a Last Name Plural or Possessive – Rules & Examples
Every year I receive Christmas cards, and like clockwork, at least one of them uses an apostrophe -s to donate a plural last name. Although this may seem cringe-worthy to a grammarian, the confusion is understandable. Making a last name plural or possessive can be a little tricky, but if you can remember a few simple rules, you’ll avoid the common mistakes that so many people make. Review our guide below, learn how to create plurals and possessives of last …
Maxima vs. maximums
Ignore the reference books that say maxima is the standard plural of maximum and that maximums is a primarily American form. These books are behind the times. Maximums is the standard plural in 21st-century English, and it is far more common than maxima in most types of writing throughout the English-speaking world. Strictly speaking, maxima is more common overall than maximums, but that’s just because the plural of maximum is most useful in the types of writing—scientific, medical, and mathematical—that typically preserve Latin …
Fora vs. forums
Forums is the more common form in popular usage.
Politics
It is usually singular, but it’s usually plural when it’s short for political beliefs.
Fungi vs. funguses
The Latin plural is preferred.