90 entries under important topic. ×
| foremost(adjective, lead, head, master) | |
| historic(adjective, importance, main, extremely significant) | |
| indispensable(adjective, significant, essential, critical) | |
| paramount(adjective, significant, prominent, basic) | |
| decisive(adjective, significant, essential, critical) | |
| dominant(superior, outstanding, significant, prominent) | |
| elementary(adjective, head, significant, beginning) | |
| necessary(adjective, significant, essential, critical) | |
| premier(adjective, lead, head, beginning) | |
| underlying(adjective, significant, original, essential) | |
| basal(adjective, lead, head, significant) | |
| capital(adjective, lead, head, master) | |
| elemental(adjective, significant, original, essential) | |
| focal(adjective, significant, main, chief) | |
| name(verb, essential, critical, basic) | |
| primordial(adjective, head, significant, beginning) | |
| rudimentary(adjective, head, significant, beginning) | |
| special(adjective, core, chief, foremost) | |
| epoch-making | |
| intrinsic(adjective, significant, original, essential) |
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| APA | Smart Define. (2016). key thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/key/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "key thesaurus" https://smartdefine.org/key/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2016, key thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/key/thesaurus/synonyms>. |
| MLA | Smart Define. "key thesaurus" 29 March 2016. Web. 21 September 2026. <https://smartdefine.org/key/thesaurus/synonyms> |