| challenging(adjective, importance, valuable, main, notable) |
| demand(noun, right, concern, want, need) |
| donnish(adjective, importance, valuable, main, notable) |
| exciting(adjective, importance, valuable, main, notable) |
| far reaching(adjective, importance, valuable, main, notable) |
| grand(adjective, importance, valuable, main, notable) |
| haughty(adjective, importance, valuable, main, notable) |
| high-up(adjective, importance, valuable, main, notable) |
| historic(adjective, importance, main, extremely significant) |
| impressive(adjective, importance, valuable, main, notable) |
| key-note(adjective, importance, valuable, main, notable) |
| major(adjective, important, significant, original, substantial) |
| natural(adjective, common, ordinary, normal, basic) |
| portentous(adjective, importance, valuable, main, notable) |
| positive(adjective, physical, material, true, greatness) |
| principle(noun, adjective, support, action, drop) |
| remarkable(adjective, importance, valuable, main, notable) |
| rudiment(noun, support, action, drop, part) |
| rudimentary(adjective, simple, important, straightforward, original) |
| significative(adjective, importance, valuable, main, notable) |