| momentous(adjective, importance, valuable, main, notable) |
| outstanding(adjective, importance, valuable, main, notable) |
| portentous(adjective, importance, valuable, main, notable) |
| purposeful(adjective, importance, valuable, main, notable) |
| remarkable(adjective, importance, valuable, main, notable) |
| responsible(adjective, importance, valuable, main, notable) |
| significative(adjective, importance, valuable, main, notable) |
| solemn(adjective, importance, valuable, main, notable) |
| substantial(adjective, importance, valuable, main, notable) |
| vital(adjective, importance, valuable, main, notable) |
| confronting(verb, opposing, confronting, defying) |
| counteracting(verb, adjective, opposing, oppositional, defying) |
| demanding(adjective, hard, tough, severe, difficult) |
| objecting(verb, adjective, opposing, disagreeing, oppositional) |
| protesting(verb, adjective, opposing, oppositional) |
| provoking(verb, adjective, stimulating) |
| questioning(verb, adjective, questioning) |
| arduous(adjective, hard, great, tough, severe) |
| resisting(verb, adjective, opposing, oppositional, defying) |
| rousing |