52 entries under develop topic. ×

1
adjust(verb, dull, rough, scratch)
1
blunt(verb, dull, rough, adjust)
1
brutalize(verb, dull, rough, adjust)
1
callus(verb, dull, rough, adjust)
1
case-harden(verb, dull, rough, adjust)
1
climatize(verb, dull, rough, adjust)
1
coarsen(verb, dull, rough, adjust)
1
cohere(form, set, firm, freeze)
1
conform(verb, dull, rough, adjust)
1
deaden(verb, dull, rough, adjust)
1
discipline(verb, dull, rough, adjust)
1
dull(verb, rough, adjust, scratch)
1
embitter(verb, dull, rough, adjust)
1
gelate(verb, form, set, fix)
1
gelatinize(verb, form, set, fix)
1
habituate(verb, dull, rough, adjust)
1
inure(verb, dull, rough, adjust)
1
jellify(verb, form, set, fix)
1
jelly(verb, form, set, fix)
1
make callous(verb, expression, dull, rough)
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APASmart Define. (2015). stiffen thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/stiffen/thesaurus/synonyms
ChicagoSmart Define. 2015. "stiffen thesaurus" https://smartdefine.org/stiffen/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, stiffen thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/stiffen/thesaurus/synonyms>.
MLASmart Define. "stiffen thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/stiffen/thesaurus/synonyms>