83 entries under primary topic. ×
| necessary(adjective, body, material, big, important) | |
| primal(adjective, lead, head, master, boss) | |
| radical(adjective, great, importance, important, significant) | |
| champion(adjective, order, bad, character, tough) | |
| controlling(adjective, top, superior, important, head) | |
| crucial(adjective, great, big, important, significant) | |
| elemental(adjective, body, material, important, significant) | |
| incomparable(adjective, bad, tough, top, perfect) | |
| peerless(adjective, bad, tough, top, perfect) | |
| topmost(adjective, top, excellent, fine, superior) | |
| underlying(adjective, important, significant, original, essential) | |
| basal(adjective, body, lead, material, important) | |
| crowning(adjective, top, excellent, fine, superior) | |
| maximum(adjective, top, excellent, fine, superior) | |
| rudimentary(adjective, important, significant, original, essential) | |
| transcendent(adjective, bad, tough, top, perfect) | |
| constitutional(adjective, body, material, important, significant) | |
| indispensable(adjective, important, significant, original, serious) | |
| matchless(adjective, bad, tough, top, perfect) | |
| original(adjective, order, body, material, heavy) |
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| APA | Smart Define. (2016). principal thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/principal/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "principal thesaurus" https://smartdefine.org/principal/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, principal thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/principal/thesaurus/synonyms>. |
| MLA | Smart Define. "principal thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/principal/thesaurus/synonyms> |