2
fall off(expression, hurt, annoy, smart, depress)
2
fatigue(verb, worry, fail, strain, annoy)
2
gag(verb, choke, vomit)
2
gasp(verb, disease, strain, heave, choke)
2
go bad(expression, decline, weaken, lessen, degenerate)
2
go to pieces(expression, idiom, break, decline, fail)
2
go to seed(expression, idiom, decline, weaken, lessen)
2
go to the dogs(expression, idiom, decline, weaken, lessen)
2
grieve(verb, break, trouble, get, hurt)
2
harass(verb, worry, fail, strain, annoy)
2
have
2
hit rock bottom(expression, idiom, decline, weaken, lessen)
2
hit the skids(expression, idiom, decline, weaken, lessen)
2
incapacitate(verb, trouble, hurt, bother, disturb)
2
indispose(verb, trouble, get, decline, hurt)
2
irk(verb, upset, bother, disturb, worry)
2
irritate(verb, upset, hurt, disturb, worry)
2
lay up(verb, expression, trouble, hurt, bother)
2
lessen(verb, decline, weaken, degenerate, deteriorate)
2
loathe
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APASmart Define. (2015). sicken thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/sicken/thesaurus/synonyms
ChicagoSmart Define. 2015. "sicken thesaurus" https://smartdefine.org/sicken/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, sicken thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/sicken/thesaurus/synonyms>.
MLASmart Define. "sicken thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/sicken/thesaurus/synonyms>