341 entries under verb topic. ×

1
case-harden(dull, develop, rough, adjust)
1
catch(place, set, fix, secure)
1
chaperon(keep, maintain, encourage, raise)
1
cherish(keep, maintain, encourage, raise)
1
climatize(dull, develop, rough, adjust)
1
coarsen(dull, develop, rough, adjust)
1
compact(close, set, fix, settle)
1
confine
1
conform(dull, develop, rough, adjust)
1
connect(place, set, fix, secure)
1
contract(close, set, fix, settle)
1
couple(place, set, fix, secure)
1
curb
1
deaden(dull, develop, rough, adjust)
1
densify(close, set, fix, settle)
1
develop(form, dull, rough, adjust)
1
discipline(dull, develop, rough, adjust)
1
dry(close, set, fix, settle)
1
dull(develop, rough, adjust, scratch)
1
embed(place, set, fix, secure)
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APASmart Define. (2015). stiffen thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/stiffen/thesaurus/synonyms
ChicagoSmart Define. 2015. "stiffen thesaurus" https://smartdefine.org/stiffen/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, stiffen thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/stiffen/thesaurus/synonyms>.
MLASmart Define. "stiffen thesaurus" 13 April 2015. Web. 28 September 2026. <https://smartdefine.org/stiffen/thesaurus/synonyms>