27 entries under adjective topic. ×
| optional | |
| unnecessary | |
| extra(noun, nonessential) | |
| voluntary | |
| expendable | |
| dispensable | |
| disposable | |
| gratuitous | |
| inessential | |
| lavish | |
| needless | |
| non-essential | |
| plush | |
| posh | |
| redundant | |
| rich | |
| ritzy | |
| secondary | |
| smart | |
| sumptuous |
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| APA | Smart Define. (2015). prerequisite thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/prerequisite/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "prerequisite thesaurus" https://smartdefine.org/prerequisite/thesaurus/antonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, prerequisite thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/prerequisite/thesaurus/antonyms>. |
| MLA | Smart Define. "prerequisite thesaurus" 4 September 2015. Web. 25 September 2026. <https://smartdefine.org/prerequisite/thesaurus/antonyms> |