| compulsory(adjective, set, significant, essential, basic) |
| constitutive(important, essential, critical, basic, fundamental) |
| courageous(adjective, resolute, tenacious) |
| dauntless(adjective, resolute, tenacious) |
| demonstrative(adjective, definite, precise, sure, specific) |
| determinant(definite, precise, sure, final, strong-minded) |
| determining(adjective, firm, big, significant, substantial) |
| distinct(adjective, firm, plain, definite, unambiguous) |
| downright(clear, total, plain, certain, full) |
| effective(tough, important, powerful, adept, effectual) |
| efficient(adjective, effective, adept) |
| enduring(adjective, great, extraordinary, outstanding, notable) |
| entire(adjective, complete, total, full, definite) |
| eventful(adjective, great, extraordinary, important, lively) |
| eventual(adjective, last, final) |
| exigent(adjective, great, big, significant, substantial) |
| factual(clear, certain, sure) |
| grave(adjective, severe, big, significant, substantial) |
| hard-and-fast(adjective, strict) |
| headstrong(adjective, resolute, tenacious) |