| principal(adjective, great, big, important, significant) |
| exigent(adjective, big, heavy, important, significant) |
| chief(adjective, great, big, heavy, important) |
| conclusive(adjective, important, determined, significant, serious) |
| paramount(adjective, important, significant, original, serious) |
| prime(adjective, important, significant, original, essential) |
| definitive(adjective, significant, last, definite, critical) |
| final(adjective, significant, last, definite, critical) |
| influential(adjective, great, big, important, powerful) |
| capital(adjective, important, serious, essential, critical) |
| focal(adjective, chief, principal, foremost) |
| importunate(adjective, big, important, significant, substantial) |
| leading(adjective, important, serious, capital, essential) |
| particular(chief, foremost) |
| special(important, chief, foremost) |
| controlling(chief, foremost) |
| convincing(important, powerful, effective, conclusive) |
| core(original, fundamental, chief, primary) |
| forceful(important, powerful, effective, conclusive) |
| head(chief, foremost) |