Synonyms of unpleasant

1 Syllable

sour, sours, gross

2 Syllables

piller, odious, heeler, nagging, creepier, uncool, awful, creepy, thankless, evil, lousy, rotten, fierce, sourer, seamy, plaguy, punker, seamier, painful, ghastlier, nastier, frightful, grody, smarting, ghastly, troublous, hard-time, yucky, toucher, sorest, grating, sorer, sourest, icky, sourish, nasty, nastiest

3 Syllables

unstirred, disturbing, irksome, unpitying, forbidding, obnoxious, subfuscous, unbeauteous, upsetting, vexatious, unhappy, sanguineous, terrible, murderous, abscessed, liverish, off-putting, unsettling, harsh-sounding, hateable, diabolic, slaughterous, abhorrent, displeasing, offputting, perturbing, poisonous, unsightly, hardnosed, comfortless

4 Syllables

ill-natured, disagreeable, aversive, troublesome, ungraciousness, abrasive, undesired, unwished-for, unsatisfying, unfulfilling, unreturned, unwelcome, repulsive, ungregarious, unappealing, uncomforting, disobliging, tempersome, disappointing, distasteful, unlikable, unlovely, uncongenial, unsavory, uninviting, acetose, ulcerated

5 Syllables

unhospitable, unsympathetic, acidulated, exceptionable, pejorative, unwelcomeness, unacceptable, unappetizing, undesirable, unpalatable, objectionable, unattractive

6 Syllables

uncompassionate, inhospitableness, inhospitality