210 entries under essential topic. ×
| exigent(adjective, significant, vital, fundamental) | |
| expedient(adjective, significant, vital, fundamental) | |
| extremity(noun, want, requirement, necessity) | |
| forming | |
| fraction | |
| godsend(requirement, prerequisite) | |
| greatest(adjective, opening, original, serious) | |
| highest(adjective, serious, prime, key) | |
| inadequacy(noun, want, requirement, necessity) | |
| incomparable(adjective, prime, fundamental, key) | |
| incumbent on(expression, adjective, significant, vital) | |
| indispensability(requirement, prerequisite) | |
| inevitability(requirement, prerequisite) | |
| inexorableness(requirement, prerequisite) | |
| ingredient(drop, part, material, element) | |
| insufficiency(noun, want, requirement, necessity) | |
| kernel(noun, short, emotion, heart) | |
| life or death(expression, key, requirement, decisive) | |
| lifeblood(noun, fundamental, necessity, quintessence) | |
| longing(noun, want, requirement, necessity) |
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| APA | Smart Define. (2015). basic thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/basic/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "basic thesaurus" https://smartdefine.org/basic/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, basic thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/basic/thesaurus/synonyms>. |
| MLA | Smart Define. "basic thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/basic/thesaurus/synonyms> |