Synonyms of ignorant

1 Syllable
young, green, dull, thick
2 Syllables
kidder, upfront, younger, dense, crudest, oafish, gawkish, nescient, gaucher, lamber, up-front, sillier, youngest, untaught, witless, shallow, naive, silly, duller, quick-fix, dullest, cruder, silliest, unread, ruder, half-grown, newish, rudest, wide-eyed, strangest, wellmeant, purblind, mindless
3 Syllables
untrained, innocent, nonexpert, half-baked, cretinous, unwarned, unwary, blunderous, lubberly, fatheaded, lowbrowed, obtuse, unjaded, unschooled, prentice, fallible, unbriefed, unknowing, unversed, smattery, benighted, unwitting, unmindful, unconscious, birdbrained, know-nothing, oblivious, boylike, girllike, unfledged, unlearned, innoxious, barbarous, moronic
4 Syllables
apprenticed, undesigning, uncultured, incognizant, atavistic, unlabored, unassumed, muddleheaded, uninformed, catachrestic, misinformed, unadvised, simpleminded, unconversant, inartistic, uniformed, unsuspecting, boneheaded, imbecilic, empty-headed, unlettered, untutored, insensible, unpracticed, unacquainted, superficial, uninjurious, unmalicious, unsuspicious
5 Syllables
unknowledgeable, uneducated, butterfingered, inexperienced, unaccustomed, preliterate, nonliterate, unembarrassed, uncultivated, unprofessional, unintellectual, uninitiate, unenlightened, illiterate, uninitiated, unperceptive, well-intentioned, uncomprehending
6 Syllables
one-dimensional