unacceptable

Synonyms

bad, bush, bush-league, crummy (also crumby), deficient, dissatisfactory, ill, inferior, lame, lousy, off, paltry, poor, punk, sour, subpar, substandard, unsatisfactory, wanting, wretched, wrong;

Antonyms

acceptable, adequate, all right, decent, fine, OK (or okay), passable, respectable, satisfactory, standard, tolerable;

Near Antonyms

classic, classical;

A1, bang-up, banner, capital, choice, crackerjack, dandy, divine, excellent, exceptional, fabulous, fine, first-class, first-rate, grand, great, heavenly, high-test, jim-dandy, keen, marvelous (or marvellous), mean, neat, nifty, noble, par excellence, perfect, premium, prime, sensational, slick, splendid, stellar, sterling, superb, superior, superlative, supernal, swell, terrific, tip-top, top, top-notch, unsurpassed, wonderful;

better, exceptional, fancy, high-grade, special, sufficient;

average, borderline, fair, mediocre, middling, minimal, so-so, unexceptional;

suitable, useful, worthy;

gratifying, satisfying;

Related Words

abysmal, atrocious, awful, brutal, damnable, deplorable, detestable, disastrous, dreadful, execrable, horrendous, horrible, pathetic, stinky, terrible, unspeakable;

defective, faulty, flawed;

egregious, flagrant, gross;

bum, cheesy, coarse, common, crappy [slang], cut-rate, junky, lesser, low-grade, low-rent, mediocre, miserable, reprehensible, rotten, rubbishy, second-rate, shoddy, sleazy, trashy;

abominable, odious, vile;

useless, valueless, worthless;

inadequate, insufficient, lacking, meager (or meagre), mean, miserly, niggardly, scanty, shabby, short, skimp, skimpy, spare, stingy;

miscreant, scurrilous, villainous;

counterfeit, fake, phony (also phoney), sham;

Phrases

below par (or under);