normal

curious, funny, peculiar, quaint, queer

aberrant, anomalous, atypical, irregular, untypical

rare, recherché, scarce

fantastic (also fantastical), phenomenal

bizarre, far-out, Kafkaesque, outrageous, outré, wacky (also whacky), way-out, weird, wild

eccentric, idiosyncratic, kooky (also kookie), nonconformist, oddball, offbeat, unconventional, unorthodox

freak, freakish

conspicuous, notable, novel, outstanding, prominent, salient, signal, striking, unexampled, unprecedented

singular, unique, unparalleled

balmy, bananas, batty, bughouse [slang], certifiable, crackbrained, cracked, crackpot, cranky [dialect], cuckoo, daffy, daft, dotty, fruity [slang], gaga, loco [slang], loony (also looney), loopy, meshuga (or meshugge), moonstruck, nuts, nutty, scatty [chiefly British], screwy, wacko (also whacko), wacky (also whacky)

aberrant, delirious, disordered

delusional, delusionary, disturbed, neurotic, obsessive-compulsive, paranoiac (also paranoic), paranoid (also paranoidal), psycho, psychotic, schizo, schizoid, schizophrenic, schizy (or schizzy)

eccentric, odd, oddball, off, pixilated (also pixillated), potty [chiefly British], queer, strange

foolish, senseless, witless

irrational, mixed-up, unreasonable

depressed, despondent

distracted, distraught, frantic, frenzied, haywire, hysterical (also hysteric), raving, wigged-out

amok (or amuck), ape, ballistic, berserk, nuclear

fixated, monomaniac, monomaniacal, obsessed

uncommon, unconventional, uncustomary, unusual, unwonted

distinctive, especial, exceptional, extraordinary, infrequent, noteworthy, rare, remarkable, singular, special, unexpected, unfamiliar, unique, unpredictable

eccentric, idiosyncratic, nonconformist, peculiar, unknown, unorthodox

curious, erratic, funky, funny, odd, oddball, offbeat, outlandish, quirky, screwy, strange, wacky (also whacky), way-out

bizarre, fantastic (also fantastical), far-out, freak, freakish, kooky (also kookie), out-of-the-way, outrageous, outré, rare, singular, unnatural, weird, wild