| exceptional(big, significant, substantial, valuable, vital) |
| exigent(big, significant, substantial, valuable, vital) |
| extensive(big, significant, substantial, valuable, vital) |
| far-reaching(big, important, significant, substantial, valuable) |
| fateful(important, significant, historic) |
| foremost(significant, vital, imperative) |
| front-page(big, significant, substantial, valuable, vital) |
| grave(big, important, significant, substantial, valuable) |
| heavy(big, important, significant, substantial, valuable) |
| heavy number(expression, important, significant, historic) |
| historic(important, significant) |
| imperative(big, significant, substantial, valuable, vital) |
| important serious(expression, important, significant, historic) |
| importunate(big, significant, substantial, valuable, vital) |
| influential(significant, vital, imperative) |
| large(big, significant, substantial, valuable, vital) |
| marked(big, significant, substantial, valuable, vital) |
| material(big, important, significant, substantial, valuable) |
| mattering much(expression, big, significant, substantial, valuable) |
| meaningful(big, important, significant, substantial, valuable) |