47 entries under essential topic. ×
| elementary(adjective, significant, basic, vital) | |
| fundamental(adjective, significant, basic, vital) | |
| momentous(adjective, significant, basic, vital) | |
| paramount(adjective, significant, basic, vital) | |
| prime(adjective, significant, basic, vital) | |
| principal(adjective, significant, basic, vital) | |
| significant(adjective, basic, vital, required) |
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| APA | Smart Define. (2015). obligatory thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/obligatory/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "obligatory thesaurus" https://smartdefine.org/obligatory/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, obligatory thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/obligatory/thesaurus/synonyms>. |
| MLA | Smart Define. "obligatory thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/obligatory/thesaurus/synonyms> |