| observable(great, extraordinary, outstanding, serious, prominent) |
| of great moment(adjective, importance, valuable, main, notable) |
| of importance(adjective, importance, valuable, main, notable) |
| of moment(expression, significant, vital, imperative) |
| of note(expression, important, outstanding, significant, prominent) |
| of substance(expression, significant, vital, imperative) |
| on the map(adjective, importance, valuable, main, notable) |
| page-oner(important, outstanding, prominent, distinguished, well-known) |
| paramount(important, outstanding, significant, prominent, vital) |
| ponderous(significant, vital, imperative) |
| popular(great, important, famous, outstanding, eminent) |
| preeminent(great, important, outstanding, serious, prominent) |
| premier(adjective, lead, head, master, boss) |
| premiere(adjective, lead, head, master, boss) |
| pressing(significant, vital, imperative) |
| prestigious(important, outstanding, prominent, distinguished, well-known) |
| primal(adjective, lead, head, master, boss) |
| prime(adjective, lead, head, master, boss) |
| red-letter(great, extraordinary, outstanding, serious, prominent) |
| redoubted(important, outstanding, prominent, distinguished, well-known) |