52 entries under adjective topic. ×

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continual
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definite
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difficult
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endurable
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enduring
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eternal
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everlasting
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indissoluble
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inflexible
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invincible
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laborious
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lasting
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long-lasting
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long-lived
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perdurable
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persistent
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protracted
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reliable
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resistant
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resolute
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APASmart Define. (2015). breakable thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/breakable/thesaurus/antonyms
ChicagoSmart Define. 2015. "breakable thesaurus" https://smartdefine.org/breakable/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2015, breakable thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/breakable/thesaurus/antonyms>.
MLASmart Define. "breakable thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/breakable/thesaurus/antonyms>