| crucial(adjective, important, significant, original, essential) |
| head(adjective, lead, beginning, master, prime) |
| indispensable(adjective, important, significant, original, essential) |
| overriding(adjective, important, significant, serious, prime) |
| pivotal(adjective, important, significant, serious, basic) |
| premier(adjective, lead, important, head, beginning) |
| highest(adjective, heavy, important, outstanding, prominent) |
| overruling(adjective, importance, important, serious, essential) |
| preeminent(adjective, important, outstanding, essential, prominent) |
| elementary(adjective, important, head, significant, beginning) |
| basal(adjective, lead, important, head, significant) |
| ruling(adjective, important, significant, original, serious) |
| constitutive(adjective, important, essential, critical, basic) |
| critical(adjective, important, original, essential, basic) |
| elemental(adjective, important, significant, original, essential) |
| outstanding(adjective, important, significant, essential, prominent) |
| prevailing(adjective, outstanding, prominent, prime) |
| special(adjective, chief, foremost) |
| controlling(adjective, outstanding, essential, prominent, prime) |
| focal(important, significant, main, chief) |