a / an
able
about
not about to
above
access
accompany
acquiesce in / acquiesce to
act / action
admission / admittance
adopted / adoptive
advance / advancement
adverse / averse
advise
affect / effect
affinity
affirmative
agenda
aggravate
alibi
all that
all in negative sentences
alleged
all right / alright
allude / allusion / refer / reference
alongside / alongside of
alternative / two or more alternatives
alternative used as an adjective
although / though
altogether / all together
anticipate
unanticipated
anxious
apparent
arrant / errant
assure / ensure / insure
awhile / a while
backward / backwards
bad / badly
beside / besides
better and best
between and among
bimonthly / biweekly / semimonthly / semiweekly
boast
born / borne
both
bring and take
capital / capitol
careen / career
center
certain
compare to / compare with
complement / compliment
compose / comprise
contact
continual / continuous
continuance / continuation
convince / persuade
could care less / couldn’t care less
definite / definitive
deprecate / depreciate
different from / different than
discreet / discrete
distinct / distinctive
dive
doubt and doubtful with that, whether, or if
drunk / drunken
due to
elder / eldest
elicit / illicit
equable / equitable
equal
escape
everyplace / anyplace / someplace / no place
exceptionable / exceptional
fact
farther / further
fewer / less
finalize
firstly
flammable / inflammable
follow
foot
forceful / forcible / forced
former / latter
fulsome
go
good / well
got / gotten
graduate
grow
hang
headquarter
healthy / healthful
historic / historical
if or whether
important
impracticable / impractical
in behalf of / on behalf of
incredible / incredulous
individual
infrastructure
intense / intensive
interface
ironic
its / it’s
lack
late
lay / lie
leave / let
lifestyle
ize
Suffix
-ability
-able
-acea
-ad
-ado
-age
-aholic
-algia
-archy
-aster
a (1)
a (2)
a capella
a priori
A&P