Synonyms of casual

1 Syllable

numb, odd, lax

2 Syllables

fluky, odd-lot, shoestring, runter, aloof, yarder, casuals, chanced, impish, minors, chancing, pixieish, minor, unmeant, skin-deep, quick-fix, driftless, laxer, aimless, hilltop, scratcher, wimpy, fluker, pettier, pettiest, random, zipper, flukier, withdrawn, outdoor, tramper, petty, common, chancer, offhand, raffish, soft-touch

3 Syllables

spontaneous, unbidden, erratic, low-ranking, stochastic, haphazard, nonformal, unhurried, free-minded, uncurious, unneeded, unguided, nonchalant, unplanned, debonair, commonest, unpunctual, unguarded, objectless, smattery, unaimed, contingent, infrequent, unfrequent, impromptu, fortuitous, by-the-way, smalltime, hang-loose, outgiving, easygoing, relaxed, unfazed, careless, offstage, lucky-dog, uncertain, hit-or-miss, off-the-cuff

4 Syllables

unimportant, unexcited, minor-league, refutable, accidental, providential, incidental, unrequired, entry-level, inconsequent, irregular, coincidental, migrational, migratorial, unintended, nonuniform, nonspecific, supervenient, unpassioned, adventitious, undesigned, unexpected, unforeseen, improvised, occasional, impulsive, nickel-and-dime, penny-ante, inessential, extempore, superficial, uncircumspect

5 Syllables

spur-of-the-moment, uninterested, insignificant, extemporaneous, unimpressible, inconsequential, unnecessary, hypothetical, unceremonious, happy-go-lucky, conversational, transmigratory, unintentional, nature-loving, unpremediated, disinterested, disimpassioned, serendipitous, pococurante

6 Syllables

unpremeditated, one-dimensional, improvisatory, inconsiderable