83 entries under harden topic. ×

5
brace(noun, verb, close, set, fix)
5
buttress(verb, close, set, fix, settle)
5
crystallize(verb, form, close, set, fix)
5
fix(verb, close, set, secure, settle)
5
inflate(verb, advance, increase, develop, raise)
5
reinforce(verb, close, set, fix, advance)
4
concrete(verb, close, set, firm, dry)
4
consolidate(verb, close, place, set, fix)
4
develop(verb, form, advance, increase, open)
4
gelatinize(verb, form, set, fix, develop)
4
jelly(verb, form, set, develop, combine)
4
spread(verb, advance, increase, open, develop)
3
build up(verb, expression, advance, increase, develop)
3
compact(verb, close, set, fix, develop)
3
distend(verb, advance, increase, open, develop)
3
ossify(verb, close, set, fix, hard)
2
amalgamate(verb, close, set, fix, settle)
2
anneal(verb, close, set, fix, settle)
2
bloat(verb, increase, open, develop, spread)
2
callous(verb, adjective, close, set, fix)
11 years ago|6.5k views|share |citing 
APASmart Define. (2015). thicken thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/thicken/thesaurus/synonyms
ChicagoSmart Define. 2015. "thicken thesaurus" https://smartdefine.org/thicken/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, thicken thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/thicken/thesaurus/synonyms>.
MLASmart Define. "thicken thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/thicken/thesaurus/synonyms>