90 entries under decline topic. ×

7
afflict(verb, trouble, get, hurt)
7
fail(verb, break, strain, annoy)
7
turn(verb, upset, trouble, disorder)
7
upset(verb, trouble, get, hurt)
7
weaken(verb, break, develop, fail)
6
come down with(verb, expression, idiom, take, get)
6
get(verb, take, get, hurt)
5
degenerate(verb, weaken, lessen, deteriorate)
5
deteriorate(verb, break, hurt, fail)
5
disorder(noun, verb, upset, get)
4
derange(verb, upset, trouble, get)
4
get worse(expression, weaken, lessen, degenerate)
4
take(verb, get, develop, catch)
4
worsen(fall, fail, weaken, degenerate)
3
collapse(verb, fail, strain, annoy)
3
corrode(verb, pain, weaken, lessen)
3
fade(verb, break, fail, annoy)
3
fall(verb, develop, fail, weaken)
3
sink(verb, get, develop, worry)
2
be impaired(verb, hurt, smart, weaken)
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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>