875 entries under verb topic. ×

5
prove(confirm, story, verify, substantiate)
5
raise(get, fix, advance, increase)
5
rise(advance, increase, develop, raise)
5
rouse(increase, develop, promote, encourage)
5
secure(support, develop, join, unite)
5
sharpen(advance, increase, raise, rise)
5
supplement(support, help, advance, increase)
5
validate(confirm, story, verify, substantiate)
4
add(increase, improve, boost, swell)
4
assist(support, help, advance, develop)
4
brace up(expression, phrasal verb, encourage, boost)
4
condense(develop, secure, join, unite)
4
embolden(encourage, excite, prepare, boost)
4
enable(fix, power, stimulate, excite)
4
entrench(support, secure, establish, protect)
4
establish(hold, open, start, secure)
4
exacerbate(increase, raise, severe, boost)
4
exalt(get, fix, increase, develop)
4
grow(charge, increase, develop, promote)
4
mass(get, charge, increase, develop)
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APASmart Define. (2016). strengthen thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/strengthen/thesaurus/synonyms
ChicagoSmart Define. 2016. "strengthen thesaurus" https://smartdefine.org/strengthen/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, strengthen thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/strengthen/thesaurus/synonyms>.
MLASmart Define. "strengthen thesaurus" 3 March 2016. Web. 29 September 2026. <https://smartdefine.org/strengthen/thesaurus/synonyms>