119 entries under adjective topic. ×
| unrequired(casual, useless, extra, worthless) | |
| unrestricted(possible, voluntary, elective) | |
| autonomous(free, deliberate, natural, willing) | |
| deliberate(free, natural, willing, charitable) | |
| gratuitous(free, deliberate, natural, casual) | |
| independent(free, deliberate, natural, willing) | |
| inessential(extraordinary, new, spare, fresh) | |
| intended(free, deliberate, natural, willing) | |
| intentional(free, deliberate, natural, willing) | |
| noncompulsory(extra, worthless, possible, pointless) | |
| perk(extraordinary, new, spare, fresh) | |
| spare(extraordinary, new, fresh, special) | |
| unasked(free, deliberate, natural, willing) | |
| unbidden(free, deliberate, natural, willing) | |
| unessential(casual, useless, extra, worthless) | |
| uninvited(useless, unwarranted, unnecessary, unjustified) | |
| unneeded(extraordinary, new, spare, fresh) | |
| willed(free, deliberate, natural, willing) | |
| accidental(casual, useless, extra, worthless) | |
| added(extraordinary, new, spare, fresh) |
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| APA | Smart Define. (2015). optional thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/optional/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "optional thesaurus" https://smartdefine.org/optional/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, optional thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/optional/thesaurus/synonyms>. |
| MLA | Smart Define. "optional thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/optional/thesaurus/synonyms> |