Synonyms|576Antonyms|83|Broader|17Narrower|5Related|326

90 entries under thicken topic. ×

1
accustom(verb, dull, develop, rough, adjust)
1
adapt(verb, dull, develop, rough, adjust)
1
adjust(verb, dull, develop, rough, scratch)
1
anneal(verb, close, set, fix, settle)
1
augment(verb, support, increase, sustain, uphold)
1
become rigid(verb, expression, harden, solidify)
1
blunt(verb, dull, develop, rough, adjust)
1
brutalize(verb, dull, develop, rough, adjust)
1
build up(verb, expression, support, increase, sustain)
1
callus(verb, dull, develop, rough, adjust)
1
case-harden(verb, dull, develop, rough, adjust)
1
clabber(set, swell, expand, freeze)
1
climatize(verb, dull, develop, rough, adjust)
1
coarsen(verb, dull, develop, rough, adjust)
1
concrete(close, set, harden, coagulate)
1
conform(verb, dull, develop, rough, adjust)
1
deaden(verb, dull, develop, rough, adjust)
1
develop(verb, form, dull, rough, adjust)
1
discipline(verb, dull, develop, rough, adjust)
1
dry(verb, close, set, fix, settle)
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APASmart Define. (2015). stiffen thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/stiffen/thesaurus/synonyms
ChicagoSmart Define. 2015. "stiffen thesaurus" https://smartdefine.org/stiffen/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, stiffen thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/stiffen/thesaurus/synonyms>.
MLASmart Define. "stiffen thesaurus" 13 April 2015. Web. 29 September 2026. <https://smartdefine.org/stiffen/thesaurus/synonyms>