Synonyms of immature

1 Syllable

fresh, rash, kid, greens, toyer, small, green, raw, boyish

2 Syllables

kidder, greenest, childish, snubber, larval, fresher, youthful, babyish, parter, rootless, latent, sillier, rawest, littler, undried, ungrown, verduous, crude, greener, rough-hewn, unfried, kidstuff, silly, freshest, baby, bitty, shrimpy, silliest, nascent, tender, preadult, callow, half-grown, smallish, beardless, milk-fed, half-done, roughhewn, rawer

3 Syllables

unripe, nuts-and-bolts, unshielded, embryonic, pubescent, jejune, unmilled, unworked, vestigial, unexpert, prentice, half-formed, shortlived, pre-adult, untreated, unbaked, unformed, ungraded, undergrown, childlike, puerile, foliate, imperfect, tenderfoot, inchoate, dependent, unwiser, unfledged, unweaned

4 Syllables

incomplete, unmatured, precipitant, unseasoned, untimely, unfinished, muddleheaded, premature, unattempted, unprocessed, sophomoric, overearly, juvenile, babylike, uncareful, adolescent, infantine, unrealized, unpracticed, infantile, formative, unfulfilled, unassembled, unfashioned

5 Syllables

unseasonable, ill-considered, irresponsible, inexperienced, unconsidered, rudimentary, undeveloped, bottom-of-barrel, unpasteurized, uninitiate, predeveloped, unaccomplished, unexecuted, unconsummated

6 Syllables

unsophisticated, underdeveloped