Synonyms of puerile

1 Syllable

green, greens, boyish, young, weak

2 Syllables

greenest, naive, childish, silly, sillier, youngest, younger, foolish, fatuous, trivial, undried, ungrown, verduous, callow, half-grown, stupid, newish, youthful, petty, babyish, greener, beardless, milk-fed, silliest, kidstuff

3 Syllables

frivolous, stupidest, light-minded, nonserious, inanest, jellybean, pubescent, half-formed, jejune, foliate, boylike, unfledged, girllike, inane, unweaned, thick-headed

4 Syllables

lamebrained, muddleheaded, ridiculous, juvenile, infantine, babylike, infantile, sophomore, immature, adolescent

5 Syllables

irresponsible, inexperienced, unreflective