Synonyms|576Antonyms|83|Broader|17Narrower|5Related|326
3
limit
3
restrain
3
restrict
2
alter
2
bound
2
change
2
trammel
1
activity
1
coagulate
1
confine
1
harden
1
modify
1
process
1
strengthen
1
turn to bone
0
rigid
0
throttle
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APASmart Define. (2015). stiffen thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/stiffen/thesaurus/broader
ChicagoSmart Define. 2015. "stiffen thesaurus" https://smartdefine.org/stiffen/thesaurus/broader (accessed September 23, 2026).
HarvardSmart Define 2015, stiffen thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/stiffen/thesaurus/broader>.
MLASmart Define. "stiffen thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/stiffen/thesaurus/broader>