107 entries under basic topic. ×
| theoretical(adjective, important, significant, original, essential) | |
| underived(adjective, important, significant, original, essential) | |
| wanted(adjective, important, significant, serious, capital) | |
| all-important(adjective, significant, essential, vital) | |
| binding(adjective, significant, essential, vital) | |
| bottom line(expression, important, significant, essential) | |
| combining | |
| component | |
| composing | |
| compulsory(adjective, significant, essential, vital) | |
| constituent | |
| constituting | |
| de rigueur(expression, adjective, significant, essential) | |
| division | |
| expedient(adjective, significant, essential, vital) | |
| forming | |
| fraction | |
| in demand(expression, main, chief, necessary) | |
| incumbent on(expression, adjective, significant, essential) | |
| ingredient |
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| APA | Smart Define. (2016). principal thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/principal/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "principal thesaurus" https://smartdefine.org/principal/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, principal thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/principal/thesaurus/synonyms>. |
| MLA | Smart Define. "principal thesaurus" 29 March 2016. Web. 20 September 2026. <https://smartdefine.org/principal/thesaurus/synonyms> |