| influential(adjective, great, excellent, solid, extraordinary) |
| marked(adjective, significant, substantial, valuable) |
| chief(adjective, significant, substantial, valuable) |
| considerable(adjective, significant, substantial, valuable) |
| critical(adjective, significant, substantial, valuable) |
| crucial(adjective, significant, substantial, valuable) |
| decisive(adjective, significant, substantial, valuable) |
| determining(adjective, significant, substantial, valuable) |
| earnest(adjective, significant, substantial, valuable) |
| essential(adjective, significant, substantial, valuable) |
| exceptional(adjective, significant, substantial, valuable) |
| exigent(adjective, significant, substantial, valuable) |
| extensive(adjective, significant, substantial, valuable) |
| far-reaching(adjective, significant, substantial, valuable) |
| front-page(adjective, outstanding, substantial, valuable) |
| grave(adjective, significant, substantial, valuable) |
| heavy(adjective, outstanding, substantial, valuable) |
| imperative(adjective, significant, substantial, valuable) |
| importunate(adjective, significant, substantial, valuable) |
| large(adjective, significant, substantial, valuable) |