Synonyms of ungrown

1 Syllable
green, greens, young, weak
2 Syllables
greenest, naive, silly, foolish, trivial, undried, verduous, callow, petty, babyish, greener
3 Syllables
half-formed, puerile, jejune, foliate, unfledged, inane
4 Syllables
ridiculous, juvenile, babylike, infantile, immature
5 Syllables
irresponsible, inexperienced