- Definitions|2
- Thesaurus|836
- Abbreviations|0
22 entries under adjective topic. ×
| indispensable | |
| necessary(reasonable, unimportant, trivial, inevitable) | |
| essential | |
| imperative | |
| key | |
| vital | |
| inevitable | |
| necessitous | |
| unavoidable | |
| compulsory | |
| decisive | |
| drastic | |
| effective | |
| elemental | |
| fundamental | |
| genuine | |
| grounded(reasonable, reasonless, volant, climatic) | |
| justifiable | |
| main | |
| mandatory |
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| APA | Smart Define. (2015). needless thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/needless/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "needless thesaurus" https://smartdefine.org/needless/thesaurus/antonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, needless thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/needless/thesaurus/antonyms>. |
| MLA | Smart Define. "needless thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/needless/thesaurus/antonyms> |