accept = to receive
except = leave out

adverse = opposing (applies to things or actions)
averse = disinclined (applies to people)

advert = refer
avert = ward off; avoid

affect = make a difference to; influence
effect = a result (n.) or to bring about a result; accomplish (v.)

aggravate = to make a bad situation worse
irritate = annoy; anger

allude = indirect reference
elude = evade

allusion = indirect reference to
illusion = something that appears real but is not
delusion = false perception

all ready = everyone/thing in readiness; properly prepared (adj.)
already = previously (adv.)

all right: correct form. Do not use alright.

altogether = completely; entirely
all together = in a group

ambiguous = more than one meaning or interpretation
ambivalent = to have mixed feelings

amend = alter for the better
emend = removing errors from text

amiable = kind, gentle, friendly (used to describe people)
amicable = agreed to peacefully (used to describe arrangements or settlements)

among = used in connection with two or more people
between = in connection with two people/things
    Exceptions: if more than two are involved in a united situation (between the six of us); if a comparison or opposition is involved.

amoral = not concerned with morality
immoral = not conforming to accepted standards of morality

amount = refers to quantity or bulk (amount of sugar)
number = refers to objects thought of as individual units (number of lemons)

climactic = forming a climax
climatic = relating to climate/weather

complacent = smug
complaisant = willing to please

comprise = embrace
constitute = establish

connotation = suggested meaning
denotation = dictionary meaning

continual = occurs over a considerable period of time
continuous = occurs without pause

council = a group of individuals who meet and discuss for decision making purposes
counsel = advice (n.) advise (v.)

councilor = member of a council
counselor = someone who guides or advises

deduce = use reason to come to a conclusion
deduct = subtract

definite = certain
definitive = with authority

defuse = remove the fuse from or reduce danger of
diffuse = spread over a wide area

deprecate = express disapproval
depreciate = lessen the value of

detract = taking away from someone’s good name
distract = drawing the mind away from

discreet = careful not to attract attention to
discrete = distinct

elicit = draw forth; bring out (v.)
illicit = unlawful (adj.)

eminent = famous or prominent
imminent = soon to happen or take place

envelop = wrap up, cover
envelope = paper container used to enclose

exceptionable = open to objection; causing offense
exceptional = unusually good; not typical

farther = physical distance
further = degree, extent

fewer = used in connection with people or object thought of as individual units
less = connected with the concept of bulk (money, grain)

flaunt = display openly
flout = openly disregard a rule

forego = precede
forgo = abstain from or go without

grizzly = the bear
grisly = causing horror or revulsion

hoard = store something
horde = crowd of people

imply = to hint or suggest
infer = to conclude or deduce

lay/laid = to put down (transitive verb)
lie/lay/lain = recline or repose (intransitive - no object)

loath = unwilling
loathe = dislike greatly

loose = unfasten; set free (v.)
lose = cease; unable to find

precede = go ahead of
proceed = go ahead with an action

regardless = without regard to, despite of. Correct form.
irregardless = non-standard.

rightfully = having a just or established claim
rightly = properly; correct

shear = to remove by cutting or clipping
sheer = swerve; deviate to avoid an unpleasant topic (v.) absolute; very thin (adj.)

stationary = standing still; fixed position (adj.)
stationery = writing materials (n.)

that = defining, restrictive pronoun
which = nondefining, nonrestricting

tortuous = full of twists and turns; lengthy and complex
torturous = characterized by pain and suffering

unexceptionable = not open to objection; beyond reproach
unexceptional = ordinary

wreath = something intertwined in a circular shape
wreathe = envelop, surround (v.)