87 entries under establish topic. ×

22
solidify(verb, form, close, place, set)
20
congeal(verb, form, close, place, set)
20
stiffen(verb, form, support, close, place)
18
set(verb, form, support, close, develop)
16
thicken(verb, form, close, place, set)
14
brace(noun, verb, support, close, set)
12
fortify(verb, support, close, set, strong)
12
reinforce(verb, support, close, set, increase)
12
toughen(verb, support, close, set, increase)
9
consolidate(verb, support, close, place, set)
9
fix(verb, close, set, secure, settle)
9
steel(verb, support, close, set, increase)
8
confirm(verb, support, strong, increase)
8
invigorate(verb, support, increase, raise, strength)
7
anneal(verb, support, close, set, increase)
7
buttress(verb, support, close, set, increase)
5
intensify(verb, support, increase, extend)
5
support(noun, verb, increase, extend)
4
sustain(verb, support, increase, keep, overcome)
3
cement(verb, close, set, develop, secure)
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APASmart Define. (2016). harden thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/harden/thesaurus/synonyms
ChicagoSmart Define. 2016. "harden thesaurus" https://smartdefine.org/harden/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, harden thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/harden/thesaurus/synonyms>.
MLASmart Define. "harden thesaurus" 24 March 2016. Web. 28 September 2026. <https://smartdefine.org/harden/thesaurus/synonyms>