| headmost(adjective, importance, priority, ranking) |
| at cutting edge(expression, importance, priority, ranking) |
| at the leading edge(expression, importance, priority, ranking) |
| number one(expression, importance, priority, ranking) |
| overriding(adjective, importance, priority, ranking) |
| pre-eminent(adjective, importance, priority, ranking) |
| principal(adjective, importance, priority, ranking) |
| super-eminent(adjective, importance, priority, ranking) |
| top(adjective, importance, priority, ranking) |
| upmost(adjective, importance, priority, ranking) |
| uppermost(adjective, importance, priority, ranking) |
| big-ticket item(expression, importance, priority, ranking) |
| central(adjective, importance, priority, ranking) |
| essential(adjective, importance, priority, ranking) |
| first of all(expression, importance, priority, ranking, firstly) |
| in the main(expression, adverb, importance, usually, priority) |
| most especially(expression, adverb, importance, priority, ranking) |
| most crucially(expression, importance, priority) |