Synonyms|580Antonyms|103|Broader|8Narrower|7Related|840
11
dull
10
flat(adjective, dull, lackluster)
5
still(adjective, adverb)
5
inactive
5
joyless
4
blue
3
lackluster
3
serious
2
noneffervescent
2
sober
2
depressed
2
stale
1
phlegmatic
1
black
1
inanimate
1
inexpressive
1
inhibited
1
leaden
1
listless
1
lumpish
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APASmart Define. (2015). effervescent thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/effervescent/thesaurus/antonyms
ChicagoSmart Define. 2015. "effervescent thesaurus" https://smartdefine.org/effervescent/thesaurus/antonyms (accessed September 21, 2026).
HarvardSmart Define 2015, effervescent thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/effervescent/thesaurus/antonyms>.
MLASmart Define. "effervescent thesaurus" 13 April 2015. Web. 21 September 2026. <https://smartdefine.org/effervescent/thesaurus/antonyms>