Synonyms|52Antonyms|1|Broader|0Narrower|0Related|38
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become obsolete(verb, expression, obsolete)
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behind the times(expression, idiom)
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corny
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dead
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defunct
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dowdy
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dull
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elderly
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fusty
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go extinct(verb, obsolesce)
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hoary
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lifeless
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medieval
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musty
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old
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old-fashioned
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old hat(expression, idiom)
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older
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oldfashioned
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out of date(expression, idiom)
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APASmart Define. (2015). outdate thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/outdate/thesaurus/synonyms
ChicagoSmart Define. 2015. "outdate thesaurus" https://smartdefine.org/outdate/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, outdate thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/outdate/thesaurus/synonyms>.
MLASmart Define. "outdate thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/outdate/thesaurus/synonyms>