Synonyms|649Antonyms|194|Broader|12Narrower|0Related|467

48 entries under adjective topic. ×

4
dull(verb, worsen, darken)
1
black
0
bleak
0
blockish
0
blunt
0
cheerless
0
cloudy
0
crepuscular
0
darkish
0
depressing
0
dismal
0
dreary
0
dusky
0
fatuous
0
foggy
0
foolish
0
fuzzy
0
gaunt
0
gloomy
0
glum
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ChicagoSmart Define. 2015. "brighten thesaurus" https://smartdefine.org/brighten/thesaurus/antonyms (accessed September 27, 2026).
HarvardSmart Define 2015, brighten thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/brighten/thesaurus/antonyms>.
MLASmart Define. "brighten thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/brighten/thesaurus/antonyms>