59 entries under principal topic. ×
| uppermost(adjective, excellent, rank, post, status) | |
| arch(adjective, position, top, superior, importance) | |
| essential(adjective, important, significant, original, prominent) | |
| capital(noun, adjective, good, quality, bad) | |
| highest(adjective, quality, bad, tough, top) | |
| major(adjective, top, superior, unusual, important) | |
| top(noun, adjective, good, quality, great) | |
| famous(adjective, great, fine, superior, important) | |
| preeminent(adjective, bad, tough, top, excellent) | |
| number one(noun, verb, expression, adjective, phrasal verb) | |
| headmost(adjective, order, top, lead, important) | |
| topmost(adjective, top, excellent, lead, fine) | |
| central(adjective, top, important, significant, original) | |
| prominent(adjective, important, outstanding, head, essential) | |
| ruling(adjective, top, excellent, fine, superior) | |
| important(adjective, significant, original, serious, essential) | |
| significant(adjective, superior, unusual, important, rank) | |
| consummate(adjective, top, superior, best) | |
| master(top, superior) | |
| noted(adjective, good, great, excellent, fine) |
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| APA | Smart Define. (2016). first thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/first/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "first thesaurus" https://smartdefine.org/first/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, first thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/first/thesaurus/synonyms>. |
| MLA | Smart Define. "first thesaurus" 31 March 2016. Web. 25 September 2026. <https://smartdefine.org/first/thesaurus/synonyms> |