| primary(adjective, lead, importance, important, head) |
| principal(adjective, top, lead, importance, important) |
| chief(adjective, quality, top, lead, superior) |
| main(adjective, quality, top, lead, superior) |
| prime(adjective, quality, lead, figure, superior) |
| essential(adjective, importance, important, significant, original) |
| fundamental(adjective, important, head, significant, beginning) |
| leading(adjective, quality, tough, top, superior) |
| central(adjective, lead, important, head, significant) |
| foremost(adjective, lead, importance, important, head) |
| paramount(adjective, quality, tough, top, perfect) |
| first(adjective, order, quality, top, superior) |
| basic(adjective, important, head, significant, beginning) |
| vital(adjective, importance, important, significant, original) |
| capital(noun, adjective, quality, top, lead) |
| dominant(adjective, quality, top, superior, important) |
| major(adjective, lead, important, head, significant) |
| predominant(adjective, perfect, important, significant, extreme) |
| underlying(adjective, important, significant, original, essential) |
| necessary(adjective, important, significant, original, essential) |