Synonyms|576Antonyms|83|Broader|17Narrower|5Related|326
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cancel
0
cheapen
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colt
0
cord
0
destabilize
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dilute(verb, weaken, soften)
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distend
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doubles
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ease off
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ease up(verb, expression, phrasal verb)
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enervate
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erosion
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featherbed
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flax
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flex
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flexibility
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flexion
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flexure
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heat(verb, weaken, soften)
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impair
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APASmart Define. (2015). stiffen thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/stiffen/thesaurus/antonyms
ChicagoSmart Define. 2015. "stiffen thesaurus" https://smartdefine.org/stiffen/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2015, stiffen thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/stiffen/thesaurus/antonyms>.
MLASmart Define. "stiffen thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/stiffen/thesaurus/antonyms>