| significative(adjective, importance, valuable, main, notable) |
| tonality |
| big league(adjective, lead, importance, head, master) |
| big shot(adjective, importance, valuable, main, notable) |
| bigwig(adjective, importance, valuable, main, notable) |
| challenging(adjective, importance, valuable, main, notable) |
| considerable(adjective, importance, main, extremely significant) |
| donnish(adjective, importance, valuable, main, notable) |
| exciting(adjective, importance, valuable, main, notable) |
| explanation(noun, return, sign, report, account) |
| far reaching(adjective, importance, valuable, main, notable) |
| first(adjective, order, important, prominent, basic) |
| foremost(adjective, lead, important, head, master) |
| guide(noun, information, influence, answer, means) |
| haughty(adjective, importance, valuable, main, notable) |
| high-up(adjective, importance, valuable, main, notable) |
| historic(adjective, importance, important, main, extremely significant) |
| impressive(adjective, importance, valuable, main, notable) |
| indication(noun, sign, prompt, guide, hint) |
| indispensable(adjective, important, significant, essential, critical) |