Synonyms|198Antonyms|1|Broader|0Narrower|0Related|20
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stalwart(steady, even, unchanging)
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staying put(expression, steady, even, unchanging)
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sturdy(steady, even, unchanging)
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sure(steady, even, unchanging)
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tempered
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timeworn
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together(steady, even, unchanging)
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toughened
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trained
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unchanged
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uniform(steady, even, unchanging)
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unrelenting
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unremitting
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unvarying(steady, even, unchanging)
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veteran
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well-built(steady, even, unchanging)
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well-known
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well-versed
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APASmart Define. (2015). long-standing thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/long-standing/thesaurus/synonyms
ChicagoSmart Define. 2015. "long-standing thesaurus" https://smartdefine.org/long-standing/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, long-standing thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/long-standing/thesaurus/synonyms>.
MLASmart Define. "long-standing thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/long-standing/thesaurus/synonyms>