| vital(adjective, top, importance, important, significant) |
| channel(noun, line, water, thing, course) |
| deep(noun, sea, ocean) |
| ocean(noun, water, sea, ocean) |
| supreme(adjective, outstanding, head, prominent, prime) |
| outstanding(adjective, great, excellent, superior, important) |
| pre-eminent |
| premier(adjective, top, lead, superior, important) |
| crucial(adjective, important, significant, original, capital) |
| duct(noun, line, thing, course, means) |
| head(adjective, top, lead, superior, important) |
| overriding(adjective, important, significant, serious, prime) |
| prevailing(adjective, outstanding, usual, prominent, prime) |
| briny |
| critical(adjective, significant, original, essential, vital) |
| pipe(noun, thing, course, opening, means) |
| necessary(adjective, important, significant, original, capital) |
| grand(adjective, lead, fine, important, head) |
| master(adjective, top, lead, superior, important) |
| most important(expression, adjective, idiom) |