possible, mature
impossible, immature
active, sane
inactive, insane
able, healthy, kind
unable, unhealthy, unkind
place, understand
misplace, misunderstand
logical, legal, literate
illogical, illegal, illiterate
competent, correct
incompetent, incorrect
sense, smoker
nonsense, non-smoker
like, trust, honest
dislike, distrust, dishonest
patient, polite
impatient, impolite