| key(adjective, characteristic, importance, essential) |
| leading(adjective, characteristic, importance, essential) |
| main(adjective, characteristic, importance, essential) |
| major(adjective, characteristic, importance, essential) |
| number one(adjective, characteristic, importance, essential) |
| outstanding(adjective, characteristic, importance, essential) |
| paramount(adjective, characteristic, importance, essential) |
| perilous(adjective, characteristic, importance, criticality) |
| pivotal(adjective, characteristic, importance, criticality) |
| potent(adjective, characteristic, importance, essential) |
| precarious(adjective, characteristic, importance, criticality) |
| predominant(adjective, characteristic, importance, essential) |
| preeminent(adjective, characteristic, importance, essential) |
| premier(adjective, characteristic, importance, essential) |
| pressing(adjective, characteristic, importance, criticality) |
| primal(adjective, characteristic, importance, essential) |
| primary(adjective, characteristic, importance, essential) |
| prime(adjective, characteristic, importance, essential) |
| principal(adjective, characteristic, importance, essential) |
| risky(adjective, characteristic, importance, criticality) |