| chief(adjective, important, significant, substantial) |
| considerable(significant, substantial, valuable, vital) |
| decisive(adjective, significant, substantial, large) |
| determining(significant, substantial, valuable, vital) |
| emergent |
| extensive(significant, substantial, valuable, vital) |
| far-reaching(severe, significant, substantial, valuable) |
| front-page(significant, substantial, valuable, vital) |
| large(significant, substantial, valuable, vital) |
| marked(significant, substantial, valuable, vital) |
| material(significant, substantial, valuable, vital) |
| mattering much(expression, significant, substantial, valuable) |
| meaningful(severe, significant, substantial, valuable) |
| of moment(expression, significant, substantial, valuable) |
| of note(expression, significant, substantial, valuable) |
| of substance(expression, significant, substantial, valuable) |
| primary(important, significant, substantial, valuable) |
| principal(adjective, important, significant, substantial) |
| relevant(significant, substantial, valuable, vital) |
| salient(important, significant, substantial, valuable) |