Synonyms for Absurd:

adj.

absurd (adjective)
eccentric, farcical, meaningless, incongruous, senseless, silly, foolish, fallacious, illogical, implausible, ludicrous, contradictory, ridiculous, self-contradictory, anachronistic, impossible, bizarre, irrational, outlandish, crazy, nonsensical, idiotic, inane, inconsistent, preposterous, paradoxical, invalid.
amusing (adjective)
comical.
balmy (adjective)
loony.
foolish (adjective)
asinine, dotty, foolish, doltish, loony, nitwit, half-witted, inane, brainless, dippy, crackpot, zany, bone-headed, ignorant, goofy, moronic, dumb, blithering, cretinous, dopey, nonsensical, knuckle-headed, chuckle-headed, meat-headed, idiotic, imbecilic, blockheaded, lame-brained, crazy, loopy, dim-witted, tomfool.
impossible (adjective)
inconceivable, implausible, unworkable, unattainable, unfeasible, unobtainable, impossible, impracticable.
insane (adjective)
balmy.
meaningless (adjective)
double talk, meaningless, senseless, hogwash, jabbering, unmeaning, nonsensical, gobbledygook, cryptic, blathering, Driveling, noisy.
ridiculous (adjective)
grotesque, incredible, preposterous, comical, ludicrous, nonsensical, laughable, dubious, ridiculous, bizarre, curious, weird, poppycock, foolish, outlandish, oddball, eccentric, outrageous, crazy, silly, farcical.
ridiculous, senseless (adjective)
idiotic, silly, laughable, illogical, crazy, goofy, ludicrous, tomfool, dippy, inane, nonsensical, foolish, preposterous, incongruous, wacky, sappy, loony, irrational, unreasonable.
senseless (adjective)
asinine.
softheaded (adjective)
softheaded.

n.

hysterical, wrong, irresponsible, perverse, childish, extreme. harebrained, insane, tomfool, dippy, jerky, lunatic, ability, mad, sappy, zany, loopy, wacky, knowledge, unearthly, softheaded, balmy. absurd (noun)
ridiculous, derisory, unreasonable, nonsensical, ludicrous, preposterous, illogical, foolish, laughable, unlogical.
preposterous (noun)
mad, pointless, unsound, untenable.

Other synonyms:

softheaded, irresponsible, perverse, unsound, jerky, loopy, wacky, dippy, wrong. childish, extreme, harebrained, hysterical. lunatic, sappy, zany. unearthly, insane. mad. Other relevant words:
dippy, harebrained, childish, loopy, softheaded, balmy, irresponsible, sappy, unreasonable, pointless, mad, wacky, zany, jerky, unsound, lunatic, insane, unlogical, extreme, unearthly, derisory, tomfool.

Usage examples for absurd

  1. It seemed absurd that there should be such a possibility; but the world was full of strange things. – The World For Sale, Volume 2. by Gilbert Parker
  2. You would certainly think that absurd – The Simple Life by Charles Wagner