- Definitions|2
- Thesaurus|2.2k
- Abbreviations|0
217 entries under essential topic. ×
| needful(adjective, important, significant, original, capital) | |
| nitty-gritty(noun, adjective, part, important) | |
| postulate(noun, verb, law, support, regulation) | |
| prerequisite(noun, adjective, important, need, significant) | |
| root(noun, adjective, support, action, drop) | |
| absolute(noun, adjective, rule, certain) | |
| assumption(noun, law, support, regulation, action) | |
| deep-seated(adjective, characteristic, original, fixed) | |
| essence(noun, support, action, cause, start) | |
| ingredient(noun, drop, part, material) | |
| keystone(noun, law, support, regulation, action) | |
| meat-and-potatoes(adjective, important, original, critical) | |
| must(noun, condition, need, certainty) | |
| part and parcel(noun, expression, adjective, idiom, characteristic) | |
| particular(noun, drop, part, material) | |
| quintessential(adjective, important, significant, basic) | |
| required(adjective, important, significant, capital) | |
| requirement(noun, concern, demand, need) | |
| theoretical(adjective, important, original, basic) | |
| underived(adjective, simple, rough, important, original) |
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| APA | Smart Define. (2016). fundamental thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/fundamental/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "fundamental thesaurus" https://smartdefine.org/fundamental/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, fundamental thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/fundamental/thesaurus/synonyms>. |
| MLA | Smart Define. "fundamental thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/fundamental/thesaurus/synonyms> |