6
ghastly(adjective, dull, bad, light, soft)
6
haggard(adjective, dull, light, soft, poor)
6
morbid(adjective, disease, gross, overpowering, cloying)
6
noisome(adjective, bad, offensive, foul, disgusting)
6
peaky(adjective, weak, thin, ill, sick)
6
unwholesome(adjective, offensive, foul, disgusting, unhealthy)
6
waxen(adjective, dull, light, soft, flat)
5
anaemic
5
declining
5
in poor health(expression, adjective, idiom, weak, thin)
5
insalubrious(adjective, offensive, foul, disgusting, harmful)
5
languid(adjective, dull, weak, easy, weakness)
5
languishing(adjective, dull, weak, easy, weakness)
5
noxious(adjective, offensive, foul, disgusting, harmful)
5
out of sorts(expression, adjective, idiom, adverb, ill)
5
rotten(adjective, bad, weakness, awful, uncertain)
5
unhealthful(offensive, foul, disgusting, harmful, poisonous)
5
valetudinarian
5
washed out(verb, expression, adjective, phrasal verb, dull)
5
wasted(adjective, weakness, uncertain, feeble, hesitant)
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APASmart Define. (2015). sickly thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/sickly/thesaurus/synonyms
ChicagoSmart Define. 2015. "sickly thesaurus" https://smartdefine.org/sickly/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, sickly thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/sickly/thesaurus/synonyms>.
MLASmart Define. "sickly thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/sickly/thesaurus/synonyms>