53 entries under adverb topic. ×

30
ailing(adjective, health, weak, sad)
24
ill(adjective, weak, sad, thin)
23
sick(adjective, health, dull, light)
23
unwell(adjective, weak, anxious, ill)
18
poorly(adjective, weak, thin, ill)
14
under the weather(expression, adjective, idiom, health)
8
weakly(adjective, weak, thin, delicate)
5
out of sorts(expression, adjective, idiom, ill)
4
frailly
4
illy(noun, pathologically)
4
infirmly(feebly, pathologically)
3
faintly
3
feebly
2
decrepitly(feebly, pathologically)
2
pathologically
2
patiently
2
unhealthily
1
affectedly
1
badly
1
contagiously
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APASmart Define. (2015). sickly thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/sickly/thesaurus/synonyms
ChicagoSmart Define. 2015. "sickly thesaurus" https://smartdefine.org/sickly/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, sickly thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/sickly/thesaurus/synonyms>.
MLASmart Define. "sickly thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/sickly/thesaurus/synonyms>