Synonyms for immature

Adjective

1. immature (vs. mature), adolescent, jejune, juvenile, puerile, babyish, childish, infantile, callow, inexperienced, naive, unsophisticated

usage: characteristic of a lack of maturity; "immature behavior"

2. immature, unformed, undeveloped (vs. developed)

usage: lacking in development; "immature plans"; "an unformed character"

3. young (vs. old), immature, adolescent, teen, teenage, teenaged, boyish, boylike, schoolboyish, childlike, childly, early, formative, girlish, schoolgirlish, infantile, junior, little, small, newborn, puppyish, puppylike, tender, vulnerable, youngish, youthful, vernal, preteen, preadolescent, immature, junior, new

usage: (used of living things especially persons) in an early period of life or development or growth; "young people"

4. green (vs. ripe), unripe, unripened, immature, unaged

usage: not fully developed or mature; not ripe; "unripe fruit"; "fried green tomatoes"; "green wood"

5. immature (vs. mature), adolescent, embryonic, embryologic, embryonal, formative, inchoative, larval, prepubescent, prepubertal, prepupal, pubescent, pupal, underdeveloped, unformed, premature, young#1, immature

usage: not yet mature

6. unfledged (vs. fledged), immature, unfeathered

usage: (of birds) not yet having developed feathers; "a small unfledged sparrow on the window sill"