83 entries under persistent topic. ×

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homogeneous(adjective, continuous, endless, relentless)
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inborn(lasting, remaining)
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inbred(lasting, remaining)
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incurable(lasting, remaining)
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ineradicable(lasting, remaining)
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ingrained(lasting, remaining)
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monochrome(adjective, continuous, endless, relentless)
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monophonic(adjective, continuous, endless, relentless)
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monotonous(adjective, continuous, endless, relentless)
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obstinate(unyielding, lasting, unremitting, remaining)
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of a piece(expression, adjective, idiom, continuous)
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recurring(lasting, remaining)
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regularized(adjective, continuous, endless, relentless)
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rooted(lasting, remaining)
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routine(lasting, remaining)
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solid as rock(expression, adjective, idiom, continuous)
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standardized(adjective, continuous, endless, relentless)
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together(adjective, continuous, endless, relentless)
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unabating(lasting, remaining)
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unflappable(adjective, continuous, endless, relentless)
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APASmart Define. (2015). sustained thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/sustained/thesaurus/synonyms
ChicagoSmart Define. 2015. "sustained thesaurus" https://smartdefine.org/sustained/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, sustained thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/sustained/thesaurus/synonyms>.
MLASmart Define. "sustained thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/sustained/thesaurus/synonyms>