| portentous(adjective, big, heavy, significant, substantial) |
| required(adjective, important, significant, serious, capital) |
| underlying(adjective, important, original, basic, vital) |
| authoritative |
| conclusive(adjective, important, determined, significant, serious) |
| distinguished(adjective, great, extraordinary, important, significant) |
| elementary(adjective, important, significant, original, essential) |
| heavyweight(adjective, great, big, heavy, important) |
| historic(great, extraordinary, important, lively, significant) |
| imperious |
| insistent(adjective, important, critical) |
| needed(adjective, important, significant, capital, essential) |
| needful(adjective, important, significant, original, capital) |
| noteworthy(adjective, important) |
| obligatory(adjective, important, significant, essential, critical) |
| paramount(adjective, important, significant, original, serious) |
| prime(adjective, important, significant, original, essential) |
| prominent(adjective, important, exalted) |
| radical(adjective, great, important, significant, original) |
| relevant(adjective, big, significant, substantial, valuable) |