| primordial(important, significant, original, basic, vital) |
| salient(adjective, big, important, significant, substantial) |
| signal(great, extraordinary, important, lively, significant) |
| substantial(big, heavy, important, significant, valuable) |
| substantive |
| telling(important, powerful, effective) |
| titanic(tough, severe, painful, problematic, trying) |
| wonderful(feature, effect) |
| high(adjective, important, prominent, exalted) |
| alpha |
| ambitious(tough, severe, painful, problematic, trying) |
| arduous(tough, severe, painful, problematic, weighty) |
| axiological(important, significant, original, basic, vital) |
| axiomatic(important, significant, original, basic, vital) |
| backbreaker(tough, severe, painful, problematic, trying) |
| barred |
| big-league(great, extraordinary, heavy, outstanding, significant) |
| big-name(adjective, important) |
| big-time(great, heavy) |
| big-wig(adjective, important) |