9
unfortunately(adverb, happily)
8
unfavorably(adverb, negatively)
4
unfriendly(adjective, adverb, prosperously, receptively)
3
adversely
2
baneful
2
disapprovingly
2
grimly
1
detrimentally
1
disadvantageously
1
disagreeably
1
disdainfully
1
disparagingly
1
dramatically
1
ill
1
negatively
1
ominously
1
unfavourably
1
unflatteringly
0
abominably
0
acerbically
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APASmart Define. (2016). favorably thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/favorably/thesaurus/antonyms
ChicagoSmart Define. 2016. "favorably thesaurus" https://smartdefine.org/favorably/thesaurus/antonyms (accessed September 27, 2026).
HarvardSmart Define 2016, favorably thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/favorably/thesaurus/antonyms>.
MLASmart Define. "favorably thesaurus" 25 March 2016. Web. 27 September 2026. <https://smartdefine.org/favorably/thesaurus/antonyms>