- Definitions|2
- Thesaurus|671
- Abbreviations|0
93 entries under adjective topic. ×
| required(important, significant, serious, essential) | |
| essential(characteristic, important, significant, original) | |
| necessary(important, significant, original, essential) | |
| imperative(important, significant, serious, essential) | |
| requisite(important, significant, original, essential) | |
| vital(important, significant, original, serious) | |
| crucial(important, significant, original, serious) | |
| important(significant, serious, essential, critical) | |
| obligatory(important, significant, essential, critical) | |
| mandatory(set, significant, essential, basic) | |
| needed(set, important, significant, essential) | |
| fundamental(characteristic, important, significant, natural) | |
| needful(set, important, significant, capital) | |
| compulsory(set, important, significant, essential) | |
| prerequisite(important, significant, essential, critical) | |
| basic(characteristic, important, significant, natural) | |
| urgent(important, significant, serious, essential) | |
| demanded | |
| key(important, significant, essential, critical) | |
| inevitable(required, obligatory) |
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| APA | Smart Define. (2015). indispensable thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/indispensable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "indispensable thesaurus" https://smartdefine.org/indispensable/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, indispensable thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/indispensable/thesaurus/synonyms>. |
| MLA | Smart Define. "indispensable thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/indispensable/thesaurus/synonyms> |