95 entries under idiom topic. ×

0
long in the tooth(expression, adjective)
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look appear
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not getting any younger(expression, adjective, aged, older)
0
old age
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on its last legs(expression, adjective, dilapidated, decaying)
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on the ropes(expression, enervated, senescent, irresilient)
0
open country
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past its best(expression, adjective, hard, sour)
0
past its sell-by date(expression, adjective, hard, sour)
0
past your prime(expression, adjective)
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run to seed(expression, age)
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stay overnight
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stricken in years(expression, age)
-1
sick as a dog(expression, enervated, senescent, irresilient)
-1
sick as dog(expression, enervated, senescent, irresilient)
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APASmart Define. (2016). old thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/old/thesaurus/synonyms
ChicagoSmart Define. 2016. "old thesaurus" https://smartdefine.org/old/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, old thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/old/thesaurus/synonyms>.
MLASmart Define. "old thesaurus" 29 February 2016. Web. 25 September 2026. <https://smartdefine.org/old/thesaurus/synonyms>