| infantile(inexperienced, young, childish, smallish, undeveloped) |
| infantine(inexperienced, young, childish, undeveloped, unformed) |
| kid(inexperienced, young, childish, undeveloped, unformed) |
| kidstuff(inexperienced, young, childish, undeveloped, unformed) |
| premature(adjective, inexperienced, young, childish, undeveloped) |
| puerile(inexperienced, young, childish, undeveloped, unformed) |
| sophomoric(inexperienced, young, childish, undeveloped, unformed) |
| tender(inexperienced, young, childish, undeveloped, unformed) |
| tenderfoot(inexperienced, young, childish, undeveloped, unformed) |
| underdeveloped(inexperienced, young, childish, undeveloped, unformed) |
| undergrown(inexperienced, young, childish, undeveloped, unformed) |
| underripe |
| undeveloped(adjective, inexperienced, young, childish, unformed) |
| undigested |
| unfinished(adjective, inexperienced, young, childish, undeveloped) |
| unformed(adjective, inexperienced, young, childish, undeveloped) |
| unpracticed(inexperienced, kidder, sophomore) |
| unseasonable(inexperienced, young, childish, undeveloped, unformed) |
| unsophisticated(inexperienced, young, childish, undeveloped, unformed) |
| untimely(inexperienced, young, childish, undeveloped, unformed) |