| No. | Item | Definition |
|---|---|---|
| 1. | arch | chief or most important |
| 2. | backbone | chief support |
| 3. | basic | forming the main foundation |
| 4. | basis | main foundation |
| 5. | bedrock | fundamental support |
| 6. | burning | urgently important |
| 7. | capital | chief or most important |
| 8. | cardinal | of greatest importance |
| 9. | central | at the core; most important |
| 10. | chief | highest in rank or importance |
| 11. | chiefest | most important |
| 12. | chiefly important | of greatest importance |
| 13. | core | most central or essential |
| 14. | cornerstone | basic and essential part |
| 15. | critical | decisively important |
| 16. | crucial | extremely important |
| 17. | decisive | settling the outcome |
| 18. | defining | characteristic and highly important |
| 19. | determinant | deciding factor |
| 20. | determinative | serving to determine |
| 21. | dominant | most influential or controlling |
| 22. | epicenter | central point of activity |
| 23. | essential | absolutely necessary; fundamental |
| 24. | first | before all others in importance |
| 25. | focus | center of attention or activity |
| 26. | foremost | most prominent or important |
| 27. | foundational | forming the basis |
| 28. | front-rank | among the most important |
| 29. | fundamental | basic and very important |
| 30. | governing | controlling or determining |
| 31. | grave | seriously important |
| 32. | greatest | highest in importance |
| 33. | head | chief or leading |
| 34. | heart | central or most important part |
| 35. | highest | topmost in rank or importance |
| 36. | hub | central point or focus |
| 37. | imperative | absolutely necessary or important |
| 38. | indispensable | too important to do without |
| 39. | integral | necessary to make whole |
| 40. | key | crucially important |
| 41. | keystone | central supporting element |
| 42. | leading | most important or prominent |
| 43. | linchpin | key holding element |
| 44. | main | most important or primary |
| 45. | mainstay | principal support or part |
| 46. | major | greater in importance or size |
| 47. | master | main or controlling |
| 48. | masterful | dominant and commanding |
| 49. | material | significantly important |
| 50. | meaningful | having real importance |
| 51. | momentous | very important |
| 52. | necessary | needed; essential |
| 53. | notable | worthy of attention |
| 54. | nucleus | central and most important part |
| 55. | number one | top in rank or importance |
| 56. | outstanding | exceptionally important or prominent |
| 57. | overriding | more important than others |
| 58. | paramount | more important than anything else |
| 59. | pivot | central point of importance |
| 60. | predominant | most common or influential |
| 61. | predominating | having greatest influence |
| 62. | preeminent | surpassing others in importance |
| 63. | premier | first in status or importance |
| 64. | preponderant | outweighing others in importance |
| 65. | primary | first in importance or order |
| 66. | prime | first in importance |
| 67. | prominent | important and well known |
| 68. | root | basic source or foundation |
| 69. | ruling | exercising chief control |
| 70. | salient | most noticeable or important |
| 71. | seminal | strongly influential and original |
| 72. | serious | important and needing attention |
| 73. | signal | notably important |
| 74. | sovereign | supreme in rank or power |
| 75. | staple | main or principal element |
| 76. | strategic | important to overall plans |
| 77. | substantial | important in amount or degree |
| 78. | substantive | real and important |
| 79. | supreme | highest in authority or importance |
| 80. | top | highest in rank or importance |
| 81. | ultimate | final or most important |
| 82. | underlying | forming the basic support or cause |
| 83. | unmatched | without equal in importance or quality |
| 84. | unrivaled | better or more important than others |
| 85. | unsurpassed | not exceeded in importance or quality |
| 86. | uppermost | highest in rank or importance |
| 87. | urgent | requiring immediate attention or importance |
| 88. | utmost | greatest possible degree or importance |
| 89. | valuable | having great worth or importance |
| 90. | venerable | commanding respect and importance |
| 91. | veritable | true or real in a strong sense |
| 92. | vital | absolutely necessary or important |
| 93. | weighty | important and deserving serious attention |
| 94. | well-founded | based on solid reasons or facts |
| 95. | well-regarded | considered important or respected |
| 96. | winning | most successful or influential |
| 97. | workaday | ordinary but practically important |
| 98. | worthiest | most deserving importance or regard |
| 99. | worthwhile | important enough to justify effort |
| 100. | worthy | deserving attention, respect, or importance |
