250 entries under idiom topic. ×

12
go downhill(verb, expression, stop, drop)
7
go to pot(verb, expression, fail, lower)
6
hit the skids(verb, expression, strong, increase)
5
run low(verb, expression, stop, drop)
4
second childhood(noun, expression, age)
3
be defeated(verb, expression, drop, fall)
3
go to pieces(verb, expression, break, reduce)
3
go to the dogs(verb, expression, reduce, fail)
3
hit rock bottom(expression, weaken, lessen, degenerate)
3
not hear of(verb, expression, phrasal verb, reject)
3
not think of(verb, expression, phrasal verb, reject)
2
back wrong horse(verb, expression, fall, fail)
2
become smaller(verb, expression, drop, reduce)
2
become worse(expression, weaken, degenerate, deteriorate)
2
come to naught(verb, expression, fall, fail)
2
come to nothing(expression, fall, fail, slip)
2
decline and fall(expression, ebb, disappearance, windup)
2
free fall(noun, expression, descent)
2
give the runaround(verb, expression, reject, ignore)
2
go bad(verb, expression, stop, end)
<1234510>
10 years ago|43k views|share |citing 
APASmart Define. (2016). decline thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/decline/thesaurus/synonyms
ChicagoSmart Define. 2016. "decline thesaurus" https://smartdefine.org/decline/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, decline thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/decline/thesaurus/synonyms>.
MLASmart Define. "decline thesaurus" 2 March 2016. Web. 23 September 2026. <https://smartdefine.org/decline/thesaurus/synonyms>