Synonyms|209Antonyms|24|Broader|6Narrower|6Related|61
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conventional
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dinosaur
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dour
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drip
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drongo
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dull
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dweeb
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dyed-in-the-wool(noun, person)
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factional(adjective, sympathetic, interested, prejudiced, opinionated)
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faithful
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faithfully
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fogey
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fuddy-duddy(noun, conventional, conservative, antediluvian, reactionary)
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hard
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headstrong
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hypocrite
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incorrigible
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inexorable
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inflexible
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insubordinate
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APASmart Define. (2015). diehard thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/diehard/thesaurus/synonyms
ChicagoSmart Define. 2015. "diehard thesaurus" https://smartdefine.org/diehard/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, diehard thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/diehard/thesaurus/synonyms>.
MLASmart Define. "diehard thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/diehard/thesaurus/synonyms>