A
- Abandon vs. abandonment
- Abdicate, abnegate, abrogate
- Abjure vs. adjure
- Abolishment vs. abolition
- Aborted vs. abortive
- Absorption vs. adsorption
- Abstruse vs. obtuse
- Accord vs. accordance
- Addiction vs. dependence
- Admission vs. admittance
- Adopted vs. adoptive
- Advance vs. advanced
- Adverse vs. averse
- Advert vs. avert
- Advice vs. advise
- Aesthetic vs. ascetic
- Affective vs. effective
- Afflict vs. inflict
- Affluent vs. effluent
- Aggression vs. aggressiveness
- Agnostic vs. atheist
- Agreement vs agreeance
- All of a sudden or all of the sudden
- Alligator vs. crocodile
- Alternate vs. alternative
- Amiable vs. amicable
- Amoral vs. immoral
- Amount vs. number
- Amuse vs. bemuse
- Analogue vs. analogy
- Analyses vs analyzes
- Ape vs. monkey
- Appraise vs. apprise
- Appropriate vs. expropriate
- April Fool's or April Fools'
- Arouse vs. rouse
- Ascent, ascendance, ascendancy, etc.
- Asphalt, cement, concrete, pavement
- Assail vs. assault
- Assent vs. consent
- Assume vs. presume
- Assure, ensure, insure
- Attain vs. obtain
- Avocation vs. vocation
B
- Bald-faced vs. boldface
- Balmy vs. barmy
- Baloney vs. bologna
- Ban vs. bar
- Band (together) vs. bandy (about)
- Bath or bathe
- Battle royal
- Biannual vs. biennial
- Blatant vs. flagrant
- Blather vs. blither
- Bloc vs. block
- Breach, breech, broach
- Breath vs. breathe
- Broach vs. brooch
- Buffer vs. buffet
- Bugbear or bugaboo
- But vs. yet
- By and by vs. by the by
C
- Cacao vs. cocoa
- Cache vs. cachet
- Calvary vs. cavalry
- Careen vs. career
- Cede vs. concede
- Censer vs censor vs censure vs sensor
- Centrifugal vs. centripetal
- Centrifuge vs. subterfuge
- Chafe vs. chaff
- Chalk up vs. chock
- Chasten vs. chastise
- Childish vs. childlike
- Chink vs. kink
- Chips vs. fries
- Clean vs. cleanse
- Clench vs. clinch
- Climactic vs. climatic
- Co-op vs. co-opt
- Coliseum vs. colosseum
- Collegial vs. collegiate
- Collocate
- Comic vs. comical
- Commentator vs. commenter
- Compel vs. impel
- Compose vs. comprise
- Concave vs. convex
- Conceive vs. perceive
- Condemn vs. condone
- Connote vs. denote
- Contemporaneous vs. contemporary
- Contemptible vs. contemptuous
- Continual vs. continuous
- Coral vs. corral
- Cornet vs. coronet
- Corollary vs. correlation
- Cosmetology vs. cosmology
- Crevasse vs. crevice
D
- Debark or disembark
- Decent vs. descent
- Decry vs. descry
- Deduce vs. induce
- Defuse vs. diffuse
- Deleterious vs detrimental
- Demur vs. demure
- Denounce vs. renounce
- Depository vs. repository
- Deprecate vs. depreciate
- Destroy vs. destruct
- Detract vs. distract
- Device vs. devise
- Dialectal vs. dialectical
- Disassemble vs. dissemble
- Discomfit vs. discomfort
- Disinterested vs. uninterested
- Dispense with vs. dispose of
- Disposed vs. predisposed
- Distinct vs. distinctive
- Double vs. redouble
- Dove vs. dived
- Downfall vs. downside
- Draconian
- Drink drank drunk
E
- Earthy vs. earthly
- Economic vs. economical
- Economics vs. finance
- Effete
- Electric, electrical, electronic
- Elegy vs. eulogy
- Emigrate vs. immigrate
- Empathy vs. sympathy
- Endemic vs. epidemic
- Enervate vs. innervate
- Enmity vs animosity
- Enormity vs. enormousness
- Entomology vs. etymology
- Envelop vs. envelope
- Envision vs. envisage
- Epigram vs. epigraph
- Equable, equatable, equitable
- Estimate vs. estimation
- Estimation or approximation
- Evoke vs. invoke
- Exhibit vs. exhibition
- Existent vs. extant
F
- Factious vs facetious
- Falsehood, falsity, falseness
- Fatuous vs facetious
- Fearful vs. fearsome
- Fervent vs. fervid
- Fictional vs. fictitious
- Filet vs. fillet
- Financer vs. financier
- Flaunt vs. flout
- Flesh out vs. flush out
- Flounder vs. founder
- Forbidding vs. foreboding
- Fortuitous vs. fortunate
- Fritter away
- Frivolity vs. frivolousness
- Futz vs putz
G
- Gage, gauge, and gouge
- Gait vs gate
- Gambit
- Gambol vs. gamble
- Gantlet vs. gauntlet
- Gargle vs. gurgle
- Garter snake
- Gibe, jibe, jive
- Grammar vs. usage
- Grammarist
- Grateful vs. gratified
- Grudge
H
- Half-mast vs. half-staff
- Hallow vs. hollow
- Hanged vs. hung
- Happy median or happy medium
- Healthful vs. healthy
- Heterogeneous vs. heterogenous
- Historic vs. historical
- Home in vs. hone in
- Homely vs. homey
- Homogenous vs. homogeneous
- Horsey, horsy, horsie
I
- Ibid vs idem
- Idea vs. ideal
- Idiom vs colloquialism
- Illegible vs. unreadable
- Immaculate Conception vs. virgin birth
- Immunity vs. impunity
- Impassive vs. passive
- Impending vs. pending
- Imperious vs. impervious
- Impinge vs. infringe
- Imply vs. infer
- Impugn vs. impute
- Incomparable vs. uncomparable
- Incredible vs. incredulous
- Indemnity and contribution
- Inequality vs. inequity
- Inequity vs. iniquity
- Infect vs. infest
- Ingenious vs. ingenuous
- Installation vs. installment
- Instantly vs. instantaneously
- Interment vs. internment
- Invaluable vs. valuable
J
- Judicial vs. judicious
- Junction vs. juncture
K
- Knave vs nave
- Knock up
L
- Laudable vs. laudatory
- Lay vs. lie
- Learnings
- Lei
- Lend vs. loan
- Lesser or lessor
- Libel vs. slander
- Lie or lye
- Lightening vs. lightning
- Liquor vs liqueur
- Literally vs. figuratively
- Loath vs. loathe (vs. loth)
- Loop de loop or loop the loop
- Lustful vs. lusty
- Luxuriant vs. luxurious
M
- Magnate vs. magnet
- Maleficent vs. malevolent
- Marinade vs. marinate
- Masterful vs. masterly
- Materiel vs. material
- Maul vs. mull
- Mediator vs. moderator
- Militate or mitigate
- Minks vs. minx
- Misinformed vs. uninformed
- Mom vs mom
- Moot vs. mute
N
- Nib vs nub
- Nutriment or nutrition
O
- Observance vs. observation
- Obsolescent vs. obsolete
- Oppress, repress, suppress
- Oral vs. verbal
- Ordinance vs. ordnance
- Overtones vs. undertones
P
- Pall vs. pallor
- Paramount vs. tantamount
- Parlay vs. parley
- Parricide vs. patricide
- Passed vs. past
- Penal vs. penile
- Periodic vs. periodical
- Perquisite vs. prerequisite (vs. requisite)
- Persecute vs. prosecute
- Perspective vs. prospective
- Picaresque vs. picturesque
- Pincer vs. pincher
- Point of view, standpoint, viewpoint
- Polemic vs. polemical
- Polygamy vs. polygyny vs. polyandry
- Populace vs. populous
- Portend vs. portent
- Practicable vs. practical
- Prebiotic vs probiotic
- Precede vs. proceed
- Preposition vs. proposition
- Presumptive vs. presumptuous
- Preventative vs. preventive
- Prone, prostrate, supine
- Proportional vs. proportionate
- Prostate vs. prostrate
- Proverbial vs figurative
- Psych vs. psyche
- Psychiatry vs. psychology
- Psychopath vs. sociopath
- Purposely vs. purposefully
Q
- Qualitative, quantitative
- Quash vs. squash
- Quiver vs quaver
R
- Ravaging vs. ravishing
- Re-create vs. recreate
- Reactionary vs. reactive
- Recent vs. resent
- Redoubt
- Regard vs. regards
- Regime vs. regimen
- Regrettable vs. regretful
- Reindeer or caribou
- Remunerate vs. renumerate
- Renege vs rescind
- Repel vs. repulse
- Restive
- Rife vs. ripe
- Riff vs. rift
- Rogue vs. rouge
S
- Sanction
- Scam or sham
- Secede vs. succeed
- Secret vs. secretive
- Sensual vs. sensuous
- Shelf vs. shelve
- Shutter vs. shudder
- Silicon vs. silicone
- Since vs because
- Sine die
- Site vs cite
- Smokey vs. smoky
- Snobbery or snobbishness
- Spat or spitted
- Specious vs spurious
- Spur vs. spurn
- Stained glass
- Stalactite, stalagmite
- Stanch vs. staunch
- Stupefaction
- Subconscious vs. unconscious
- Substantial vs. substantive
- Swath vs. swathe
- Systematic vs. systemic
T
- Tack vs. tact
- Telegram vs. telegraph
- Tenant vs. tenet
- Timber or timbre
- Tolerance vs. toleration
- Topography vs. typography
- Torturous vs. tortuous
- Toxicology vs. toxology
- Translucent vs. transparent
- Trawl vs. troll
- Trooper or trouper
- Turbid, turgid, torpid
- Turtle, tortoise, terrapin
U
- Udder vs. utter
- Upmost vs. utmost
V
- Vacuous vs. vapid
- Vagina vs. vulva
- Vale, vail, or veil
- Variety vs varietal
- Vertex vs. vortex
- Vicious vs. viscous
W
- Wanton vs. wonton
- Warrantee vs. warranty
- Wary vs. weary
- Wheelhouse
- Whiny, whiney, whinny, Whinney
- Wreath vs. wreathe
Y
- Yea, yeah, yay
- Yoke vs. yolk