| moderate(adjective, good, dull, weak) | |
| nonviolent(adjective, good, dull, weak) | |
| originator | |
| pleasant(adjective, good, dull, weak) | |
| quiet(adjective, good, dull, weak) | |
| rational(adjective, calm, sound) | |
| realistic(adjective, calm, sound) | |
| reasonable(adjective, calm, sound) | |
| responsible(adjective, calm, sound) | |
| reticent(adjective, shy) | |
| retiring(adjective, shy) | |
| sane(adjective, calm, sound) | |
| sensible(adjective, calm, sound) | |
| smart(adjective, calm, sound) | |
| sound(adjective, calm) | |
| stable | |
| tame(adjective, good, dull, weak) | |
| tender(adjective, good, dull, weak) | |
| timid(adjective, shy) | |
| unpassionate(adjective, good, dull, weak, passionate) |
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| APA | Smart Define. (2015). aper thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/aper/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "aper thesaurus" https://smartdefine.org/aper/thesaurus/antonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, aper thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/aper/thesaurus/antonyms>. |
| MLA | Smart Define. "aper thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/aper/thesaurus/antonyms> |