Adjective. 

Not usual, not typical, strange

Synonyms: Freakish, unnatural, irregular, anomalous

Antonyms: normal, usual, regular, typical

Verb.

To turn bottom size up, upset

Synonyms: overturn, upend, tip over

Antonyms: remain upright

Noun.

A large-scale disaster, misfortune, or failure

Synonyms: Calamity, tragedy, cataclysm

Antonyms: Triumph, victory, success

Verb.

To become or make less

Noun.

A lessening

Synonyms: (v.) lessen, reduce, dwindle, diminish

Antonyms: (v.) increase, grow, develop, wax

Adjective.

Inclined to argue or debate; provoking debate

Synonyms: argumentative, quarrelsome, contentious

Antonyms: nonargumentative,peaceable, pacific

verb: to drive or throw out, evict

Synonyms: oust, expel, kick out

Antonyms: admit, let in, insert

verb: to grow, thrive, be prosperous; to wave in the air; noun: a dramatic gesture, a fanfare of horns

Synonyms: prosper, burgeon, increase

Antonyms: wither, die, fade, shrivel up

noun: a reason for doing something; something that stimulates action

Synonyms: stimulus, spur, motive, inducement

Antonyms: curb, check, restraint, hindrance