| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | most important, essential |
| Synonyms: | arch, capital, cardinal, central, champion, consequential, controlling, crucial, effective, especial, first, foremost, grand, head, highest, key, leading, main, major, momentous, number one, outstanding, paramount, potent, predominant, preeminent, premier, primal, primary, prime, principal, ruling, significant, star, stellar, superior, supreme, telling, uppermost, vital, weighty |
| Antonyms: | inessential, minor, secondary, subordinate, unimportant, unnecessary |
| Main Entry: | grand |
| Part of Speech: | adjective |
| Definition: | most important |
| Synonyms: | chief, dignified, elevated, exalted, grave, head, highest, leading, lofty, main, majestic, mighty, noble, preeminent, principal, regal, supreme, transcendent |
| Antonyms: | contemptible, inferior, insignificant, pitiful, poor, unimportant |
| Main Entry: | head |
| Part of Speech: | adjective |
| Definition: | most important; chief |
| Synonyms: | arch, champion, first, foremost, front, highest, leading, main, pioneer, preeminent, premier, prime, principal, stellar, supreme, topmost |
| Antonyms: | auxiliary, inferior, lower, second, secondary, trivial, unimportant |
| Main Entry: | leading |
| Part of Speech: | adjective |
| Definition: | chief, superior |
| Synonyms: | arch, best, champion, dominant, dominating, famous, first, foremost, governing, greatest, headmost, highest, inaugural, initial, main, noted, notorious, number one, outstanding, popular, preeminent, premier, primary, principal, prominent, ruling, stellar, top, well-known |
| Antonyms: | inferior, last, subordinate, supplementary, unimportant |
| Main Entry: | most |
| Part of Speech: | adjective |
| Definition: | best, greatest |
| Synonyms: | better, biggest, greater, highest, largest, lion's share, max, maximum, ultimate, utmost, uttermost |
| Antonyms: | least |
| Main Entry: | optimal |
| Part of Speech: | adjective |
| Definition: | optimum |
| Synonyms: | 24-carat, A1, ace, best, capital, choice, choicest, excellent, flawless, gilt-edge, greatest, highest, ideal, matchless, maximum, most advantageous, most favorable, peak, peerless, perfect, select, solid gold, superlative, top, world class |
| Main Entry: | optimum |
| Part of Speech: | adjective |
| Definition: | best |
| Synonyms: | -carat, A1, ace, capital, choice, choicest, excellent, flawless, gilt-edge, greatest, highest, ideal, matchless, maximum, most advantageous, most favorable, optimal, peak, peerless, perfect, select, solid gold, superlative, world class |
| Antonyms: | least, poorest, worst |
| Main Entry: | premier |
| Part of Speech: | adjective |
| Definition: | leading; original |
| Synonyms: | arch, beginning, champion, chief, earliest, first, foremost, head, highest, inaugural, initial, main, opening, primary, prime, principal |
| Antonyms: | inferior, minor |
| Main Entry: | primal |
| Part of Speech: | adjective |
| Definition: | primeval; primary |
| Synonyms: | aboriginal, ancient, central, chief, earliest, early, first, fundamental, highest, old, original, paramount, past, prehistoric, primitive, primordial, principal, pristine |