- Definitions|2
- Thesaurus|671
- Abbreviations|0
| substrative(important, significant, original, basic, vital) | |
| supporting(important, significant, original, basic, vital) | |
| sustaining(important, significant, original, basic, vital) | |
| theoretical(important, significant, original, basic, vital) | |
| unalienable | |
| underived(important, significant, original, basic, vital) | |
| underlined(important, essential, critical, basic, fundamental) | |
| unforgoable | |
| want | |
| panties | |
| advantageous(adjective, constructive) | |
| ask | |
| basilar | |
| blackmail | |
| bottom line(expression, important, significant, essential, basic) | |
| brass | |
| bread | |
| breeches | |
| bucks | |
| built-in |
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| APA | Smart Define. (2015). indispensable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/indispensable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "indispensable thesaurus" https://smartdefine.org/indispensable/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, indispensable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/indispensable/thesaurus/synonyms>. |
| MLA | Smart Define. "indispensable thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/indispensable/thesaurus/synonyms> |