20 entries under adverb topic. ×
| badly | |
| critically | |
| deeply | |
| desperately | |
| earnestly | |
| gravely | |
| greatly | |
| grievously | |
| importantly | |
| momentously | |
| sadly | |
| sedately | |
| seriously | |
| severely | |
| significantly | |
| soberly | |
| solemnly | |
| somberly | |
| thoughtfully | |
| weightily |
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| APA | Smart Define. (2016). brightness thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/brightness/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "brightness thesaurus" https://smartdefine.org/brightness/thesaurus/antonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2016, brightness thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/brightness/thesaurus/antonyms>. |
| MLA | Smart Define. "brightness thesaurus" 29 February 2016. Web. 27 September 2026. <https://smartdefine.org/brightness/thesaurus/antonyms> |