| meaningful(significant, substantial, valuable, vital) |
| momentous(important, significant, substantial, valuable) |
| necessary(significant, substantial, valuable, vital) |
| of moment(expression, significant, substantial, valuable) |
| of substance(expression, significant, substantial, valuable) |
| ponderous(significant, substantial, valuable, vital) |
| pressing(significant, substantial, valuable, vital) |
| primary(significant, substantial, valuable, vital) |
| principal(significant, substantial, valuable, vital) |
| relevant(significant, substantial, valuable, vital) |
| salient(significant, substantial, valuable, vital) |
| serious(great, heavy, significant, substantial) |
| significant(important, substantial, valuable, vital) |
| something(significant, substantial, valuable, vital) |
| standout(significant, substantial, valuable, vital) |
| urgent(significant, substantial, valuable, vital) |
| vital(significant, substantial, valuable, imperative) |
| weighty(significant, substantial, valuable, vital) |
| substantial(significant, valuable, vital, imperative) |
| valuable(significant, substantial, vital, imperative) |