| No. | Item | Definition |
|---|---|---|
| 1. | adolescent | Typical of a teenager |
| 2. | airheaded | Silly and lacking sense |
| 3. | amateurish | Lacking professional skill or polish |
| 4. | babyish | Too childlike for one’s age |
| 5. | boorish | Crude and socially undeveloped |
| 6. | bratty | Spoiled and childishly difficult |
| 7. | budding | Beginning to develop |
| 8. | callow | Young and inexperienced |
| 9. | capricious | Changing whims without mature reason |
| 10. | childish | Like a child in behavior |
| 11. | childlike | Having qualities of a child |
| 12. | clingy | Childishly dependent or attached |
| 13. | coarse | Rough and lacking refinement |
| 14. | crass | Lacking mature refinement or sensitivity |
| 15. | crude | Lacking refinement or development |
| 16. | dependent | Not self-reliant or grown-up |
| 17. | ditzy | Silly or scatterbrained |
| 18. | early-stage | At an initial stage |
| 19. | egocentric | Childishly centered on oneself |
| 20. | embryonic | In an early developmental stage |
| 21. | emerging | Starting to become developed |
| 22. | empty-headed | Foolish and lacking sense |
| 23. | entitled | Childishly expecting special treatment |
| 24. | erratic | Inconsistent and lacking steadiness |
| 25. | fledgling | Newly developing and inexperienced |
| 26. | flighty | Unstable and lacking seriousness |
| 27. | flippant | Too casually unserious |
| 28. | foolish | Lacking good judgment |
| 29. | formless | Not clearly shaped or developed |
| 30. | fresh | New and lacking experience |
| 31. | frivolous | Not serious or mature |
| 32. | giddy | Silly and overexcited |
| 33. | goofy | Silly and not serious |
| 34. | green | Lacking experience or development |
| 35. | growing | Still developing or maturing |
| 36. | half-baked | Poorly developed or considered |
| 37. | half-grown | Not fully grown |
| 38. | hasty | Done with insufficient mature thought |
| 39. | ill-conceived | Badly planned or undeveloped |
| 40. | impulsive | Acting without enough thought |
| 41. | incipient | Just beginning to appear |
| 42. | inconsiderate | Lacking thoughtful regard for others |
| 43. | inconstant | Not steady or reliable |
| 44. | indecisive | Unable to decide firmly |
| 45. | inexperienced | Lacking practical knowledge or skill |
| 46. | infantile | Extremely childish or babyish |
| 47. | irresolute | Lacking firm mature resolve |
| 48. | irresponsible | Not acting like a mature adult |
| 49. | juvenile | Young or childlike in manner |
| 50. | kiddish | Childlike or childish |
| 51. | light-minded | Lacking seriousness or depth |
| 52. | moody | Childishly changeable in mood |
| 53. | naive | Innocent and lacking experience |
| 54. | nascent | Just beginning to develop |
| 55. | needy | Childishly dependent or attention-seeking |
| 56. | not adult | Not mature in behavior |
| 57. | not fully formed | Still incomplete or undeveloped |
| 58. | not grown-up | Not behaving like an adult |
| 59. | not ready | Not prepared or mature enough |
| 60. | petulant | Childishly sulky or irritable |
| 61. | poorly developed | Not developed enough |
| 62. | pouty | Childishly sulky or displeased |
| 63. | prepubescent | Not yet sexually mature |
| 64. | puerile | Silly and childishly trivial |
| 65. | rash | Acting without mature thought |
| 66. | raw | Untrained or undeveloped |
| 67. | reckless | Careless and lacking mature judgment |
| 68. | rough | Not refined or finished |
| 69. | rudimentary | Basic and not fully developed |
| 70. | scatterbrained | Disorganized and lacking focus |
| 71. | schoolboyish | Childishly like a schoolboy |
| 72. | schoolgirlish | Childishly like a schoolgirl |
| 73. | self-absorbed | Overly focused on oneself |
| 74. | self-centered | Childishly focused on oneself |
| 75. | shallow | Lacking emotional or intellectual depth |
| 76. | silly | Childishly foolish or unserious |
| 77. | sniveling | Childishly whining or complaining |
| 78. | spoiled | Childishly self-centered or demanding |
| 79. | sulky | Childishly resentful or moody |
| 80. | tantrum-prone | Likely to have childish outbursts |
| 81. | temperamental | Childishly prone to mood changes |
| 82. | thoughtless | Lacking consideration or mature judgment |
| 83. | touchy | Easily upset in a childish way |
| 84. | underdeveloped | Insufficiently developed or advanced |
| 85. | undeveloped | Not fully grown or advanced |
| 86. | unformed | Not yet fully shaped |
| 87. | unpolished | Not refined or fully developed |
| 88. | unpracticed | Lacking practice or skill |
| 89. | unprofessional | Not maturely or properly professional |
| 90. | unripe | Not ready or fully developed |
| 91. | unschooled | Lacking formal training or experience |
| 92. | unseasoned | Not experienced or fully prepared |
| 93. | unskilled | Lacking developed skill |
| 94. | untested | Not proven through experience |
| 95. | untrained | Not properly taught or developed |
| 96. | untried | Not tested by experience |
| 97. | wavering | Unsteady in judgment or resolve |
| 98. | whiny | Childishly complaining |
| 99. | young | Not old or fully developed |
| 100. | youthful | Young in manner or development |
