208 entries under basic topic. ×
| ingrained(adjective, characteristic, natural, individual) | |
| radical(adjective, importance, important, significant, original) | |
| sine qua non(noun, expression, idiom, condition, importance) | |
| element(noun, form, drop, part, fix) | |
| mandatory(adjective, set, significant, vital) | |
| needful(adjective, set, important, significant, original) | |
| obligatory(adjective, important, significant, critical) | |
| first(adjective, important, significant, original, prominent) | |
| internal(adjective, characteristic, natural, intimate) | |
| basal(adjective, body, simple, plain, material) | |
| compulsory(adjective, set, important, significant, critical) | |
| condition(noun, position, need, shape, situation) | |
| essence(noun, nature, feature, support, action) | |
| interior(adjective, important, significant, main) | |
| outstanding(adjective, importance, important, significant, valuable) | |
| significant(adjective, importance, big, important, original) | |
| absolute(adjective, physical, material, true) | |
| congenital(adjective, reasonable, natural, fundamental) | |
| constituent(noun, adjective, drop, part, material) | |
| foremost(adjective, importance, big, important, significant) |
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| APA | Smart Define. (2016). essential thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/essential/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "essential thesaurus" https://smartdefine.org/essential/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, essential thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/essential/thesaurus/synonyms>. |
| MLA | Smart Define. "essential thesaurus" 31 March 2016. Web. 22 September 2026. <https://smartdefine.org/essential/thesaurus/synonyms> |