| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | preadult or immature |
| Synonyms: | boyish, girlish, growing, juvenile, pubescent, puerile, teen, teenage, young, youthful |
| Antonyms: | adult, infant |
| Main Entry: | immature |
| Part of Speech: | adjective |
| Definition: | young, inexperienced |
| Synonyms: | adolescent, baby, babyish, callow, childish, crude, green*, half-grown, imperfect, infantile, infantine, jejune, juvenile, kid, kidstuff, premature, puerile, raw, sophomoric, tender*, tenderfoot, underdeveloped, undergrown, undeveloped, unfinished, unfledged, unformed, unripe, unseasonable, unseasoned, unsophisticated, untimely, wet behind ears, youthful |
| Antonyms: | adult, developed, experienced, grown, mature, old |
| Main Entry: | juvenile |
| Part of Speech: | adjective |
| Definition: | childish |
| Synonyms: | adolescent, babyish, beardless, blooming, boyish, budding, callow, childlike, developing, formative, fresh, girlish, green, growing, immature, inexperienced, infant, infantile, jejune, junior, kid stuff, milk-fed, naive, pubescent, puerile, teenage, tender, undeveloped, unfledged, unripe, unsophisticated, unweaned, vernal, young, younger, youthful |
| Antonyms: | adult, grown-up, mature |
| Main Entry: | young |
| Part of Speech: | adjective |
| Definition: | immature |
| Synonyms: | adolescent, blooming, blossoming, boyish, boylike, budding, burgeoning, callow, childish, childlike, crude, developing, early, fledgling, fresh, girlish, girllike, green*, growing, half-grown, ignorant, inexperienced, infant, inferior, junior, juvenile, little, modern, new, newborn, newish, not aged, pubescent, puerile, punk, raw, recent, tender, tenderfoot, undeveloped, undisciplined, unfinished, unfledged, unlearned, unpracticed, unripe, unseasoned, untried, unversed, vernal, youthful |
| Notes: | to be young is to be immature or not old; to be youthful is having the attractive qualities of a young person |
| Antonyms: | mature, old, older |
| Main Entry: | youthful |
| Part of Speech: | adjective |
| Definition: | new, immature |
| Synonyms: | active, adolescent, boyish, budding, buoyant, callow, childish, childlike, enthusiastic, fresh, full of life, girlish, green*, inexperienced, infant, juvenile, keen, pubescent, puerile, tender, underage, vernal, vigorous, young |
| Notes: | to be young is to be immature or not old; to be youthful is having the attractive qualities of a young person |
| Antonyms: | experienced, mature, old |
| Main Entry: | boyish |
| Part of Speech: | adjective |
| Definition: | youthful |
| Synonyms: | adolescent, boylike, childish, immature, innocent, juvenile, puerile, young |
| Antonyms: | adult, mature |
| Main Entry: | underage |
| Part of Speech: | adjective |
| Definition: | below legal age |
| Synonyms: | adolescent, junior, juvenile, minor, underaged |