106 entries under essential topic. ×
| constitutional(adjective, important, original, basic) | |
| elemental(adjective, important, original, basic) | |
| elementary(adjective, important, original, basic) | |
| exigent(adjective, great, big, heavy, important) | |
| foundational(adjective, important, original, basic) | |
| grass-roots(adjective, important, original, basic) | |
| intrinsic(adjective, important, original, substantial, serious) | |
| life-or-death(important, critical, fundamental, imperative) | |
| meat-and-potatoes(adjective, important, original, critical) | |
| name-of-the-game(important, critical, fundamental, imperative) | |
| needed(adjective, important, critical, basic) | |
| nitty-gritty(important, critical, fundamental, imperative) | |
| original(adjective, important, basic, vital) | |
| prerequisite(adjective, important, critical, basic) | |
| primitive(adjective, important, original, basic) | |
| primordial(adjective, important, original, basic) | |
| required(adjective, important, critical, basic) | |
| requisite(adjective, important, original, critical) | |
| rudimentary(adjective, important, original, basic) | |
| ruling(adjective, important, prominent, basic) |
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| APA | Smart Define. (2016). significant thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/significant/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "significant thesaurus" https://smartdefine.org/significant/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, significant thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/significant/thesaurus/synonyms>. |
| MLA | Smart Define. "significant thesaurus" 4 March 2016. Web. 24 September 2026. <https://smartdefine.org/significant/thesaurus/synonyms> |