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endurance(adjective, continuation)
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enduring
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eternal
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evergreen
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hard
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hard-bitten
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hard put
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hard to please
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hard up
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hardened
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hardy
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hefty
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immutable
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incessant
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incorruptible
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indefatigable
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inextinguishable
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inured
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irreversible
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lasting
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APASmart Define. (2016). perishable thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/perishable/thesaurus/antonyms
ChicagoSmart Define. 2016. "perishable thesaurus" https://smartdefine.org/perishable/thesaurus/antonyms (accessed September 21, 2026).
HarvardSmart Define 2016, perishable thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/perishable/thesaurus/antonyms>.
MLASmart Define. "perishable thesaurus" 26 February 2016. Web. 21 September 2026. <https://smartdefine.org/perishable/thesaurus/antonyms>