102 entries under significant topic. ×
| principal(adjective, lead, important, head) | |
| fundamental(noun, adjective, important, head) | |
| main(adjective, lead, important, head) | |
| cardinal(noun, adjective, lead, important, head) | |
| chief(adjective, lead, important, head) | |
| primary(adjective, lead, important, head) | |
| crucial(adjective, important, original, essential) | |
| major(adjective, lead, important, head) | |
| material(adjective, importance, important, large) | |
| prime(adjective, lead, important, head) | |
| basic(adjective, important, head, beginning) | |
| leading(adjective, important, head, beginning) | |
| critical(adjective, important, essential, basic) | |
| indispensable(adjective, important, essential, critical) | |
| paramount(adjective, important, prominent, basic) | |
| decisive(adjective, important, essential, critical) | |
| dominant(superior, important, outstanding, prominent) | |
| elementary(adjective, important, head, beginning) | |
| necessary(adjective, important, essential, critical) | |
| underlying(adjective, important, original, essential) |
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| APA | Smart Define. (2016). key thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/key/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "key thesaurus" https://smartdefine.org/key/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, key thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/key/thesaurus/synonyms>. |
| MLA | Smart Define. "key thesaurus" 29 March 2016. Web. 20 September 2026. <https://smartdefine.org/key/thesaurus/synonyms> |