| preparatory(adjective, basic, introductory) |
| preponderant |
| pristine(adjective, violent, head, beginning, vicious) |
| pure(adjective, pure) |
| significant(adjective, superior, big, unusual, important) |
| top(adjective, excellent, fine, superior, important) |
| unadulterated(adjective, pure) |
| ranking |
| base(adjective, lead, head, master, boss) |
| caucus(noun, council) |
| constitutive(important, original, serious, basic, prime) |
| controlling(adjective, outstanding, essential, prominent, prime) |
| early(adjective, simple, head, beginning, original) |
| embryonic(cause, simple, original, basic, fundamental) |
| focal(adjective, important, significant, key, main) |
| germinal(cause, opening, original, first, early) |
| grand(adjective, lead, fine, important, head) |
| hands-on |
| iconic(adjective, most important) |
| indispensable(adjective, important, significant, original, serious) |