| No. | Item | Definition |
|---|---|---|
| 1. | absolutely needed | completely necessary |
| 2. | all-important | more important than everything else |
| 3. | badly needed | needed very much |
| 4. | basic | forming a necessary foundation |
| 5. | bedrock | forming a firm essential basis |
| 6. | beneficial | producing good or helpful results |
| 7. | built-in | included as an essential part |
| 8. | cardinal | of primary importance |
| 9. | central | main or most important |
| 10. | chief | highest in importance |
| 11. | compulsory | required; not optional |
| 12. | consequential | having important effects or results |
| 13. | core | central and most important |
| 14. | critical | of great importance or urgency |
| 15. | crucial | decisive or extremely important |
| 16. | deciding | settling or determining the result |
| 17. | decisive | settling an outcome; crucial |
| 18. | deep-seated | firmly established and important |
| 19. | determinative | decisive in determining an outcome |
| 20. | dominant | having chief importance or influence |
| 21. | elemental | basic and essential |
| 22. | embedded | fixed firmly within something |
| 23. | essential | absolutely necessary or extremely important |
| 24. | essentially needed | needed in a basic way |
| 25. | far-reaching | having wide and important effects |
| 26. | first-priority | most urgent or important |
| 27. | focal | central and important |
| 28. | forceful | strong and effective |
| 29. | foremost | most important or leading |
| 30. | foundational | serving as an essential base |
| 31. | fundamental | basic and very important |
| 32. | germane | directly relevant and important |
| 33. | grave | serious and important |
| 34. | health-giving | promoting health or well-being |
| 35. | high-priority | very important and needing attention |
| 36. | high-value | having great worth or importance |
| 37. | imperative | requiring urgent attention or action |
| 38. | important | having great value or significance |
| 39. | indispensable | too important to do without |
| 40. | influential | having important effects or power |
| 41. | inherent | existing as an essential quality |
| 42. | integral | necessary to make a whole |
| 43. | intrinsic | belonging naturally and essentially |
| 44. | invaluable | extremely useful or important |
| 45. | key | especially important to success |
| 46. | leading | most important or prominent |
| 47. | life-and-death | involving survival; extremely important |
| 48. | life-or-death | extremely urgent and important |
| 49. | life-supporting | helping maintain life |
| 50. | life-sustaining | needed to keep life going |
| 51. | lifesaving | able to prevent death |
| 52. | main | chief or most important |
| 53. | major | very important or significant |
| 54. | mandatory | required by rule or need |
| 55. | marked | noticeable and significant |
| 56. | material | important and relevant |
| 57. | mission-critical | essential to success or operation |
| 58. | momentous | very important, especially historically |
| 59. | must-have | necessary to have or use |
| 60. | necessary | needed; not optional |
| 61. | needed | required or necessary |
| 62. | needful | necessary or required |
| 63. | nonnegotiable | required and not open to compromise |
| 64. | notable | worthy of attention or importance |
| 65. | noteworthy | important enough to notice |
| 66. | nourishing | providing what supports growth or health |
| 67. | nutritive | providing nourishment or sustenance |
| 68. | obligatory | required or expected |
| 69. | of the essence | extremely important or urgent |
| 70. | organic | naturally and essentially connected |
| 71. | overriding | more important than other considerations |
| 72. | paramount | more important than anything else |
| 73. | pivotal | having a decisive role |
| 74. | preeminent | surpassing others in importance |
| 75. | pressing | needing quick action or attention |
| 76. | priceless | extremely valuable or important |
| 77. | primary | first in importance |
| 78. | prime | main or most important |
| 79. | principal | chief or most important |
| 80. | relevant | important to the matter at hand |
| 81. | required | officially or practically needed |
| 82. | requisite | needed for a purpose |
| 83. | restorative | helping restore strength or health |
| 84. | rooted | firmly based or established |
| 85. | rudimentary | basic and essential |
| 86. | salutary | beneficial to health or welfare |
| 87. | significant | important enough to be noticed |
| 88. | strengthening | making stronger or more effective |
| 89. | substantial | large or important in amount |
| 90. | supporting | helping maintain or uphold |
| 91. | supreme | highest in importance or authority |
| 92. | survival-critical | essential for continued survival |
| 93. | sustaining | keeping something going or alive |
| 94. | telling | having a strong or important effect |
| 95. | top-priority | needing attention before others |
| 96. | underlying | basic and supporting other things |
| 97. | urgent | needing immediate attention or action |
| 98. | valuable | having great worth or usefulness |
| 99. | wanted | needed or desired |
| 100. | weighty | serious and important |