| mainland | |
| mainly | |
| mains | |
| midmost(adjective, central) | |
| notable(adjective, great, big, important, wonderful) | |
| noteworthy(adjective, important, wonderful, exceptional, marvelous) | |
| out-and-out | |
| radical(importance, important, significant, original, essential) | |
| salt water(expression, idiom, ocean) | |
| simple(adjective, top, utter, absolute, first) | |
| substantial(adjective, significant, vital, imperative) | |
| teacher's pet | |
| top(adjective, quality, great, superior, heavy) | |
| top of mind(adjective, most important) | |
| trunk(noun, adjective, lead, head, master) | |
| utmost(adjective, utter, absolute, supreme, dominant) | |
| all-absorbing | |
| arroyo | |
| artery | |
| ascendant(adjective, top, superior, powerful, prime) |
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| APA | Smart Define. (2016). main thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/main/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "main thesaurus" https://smartdefine.org/main/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, main thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/main/thesaurus/synonyms>. |
| MLA | Smart Define. "main thesaurus" 29 March 2016. Web. 22 September 2026. <https://smartdefine.org/main/thesaurus/synonyms> |