875 entries under verb topic. ×

4
multiply(support, advance, increase, develop)
4
muster(get, increase, reduce, promote)
4
quicken(increase, promote, encourage, raise)
4
ratify(confirm, story, verify, substantiate)
4
revitalize(fix, promote, encourage, raise)
4
sinew(noun, powerful, fortify, brace)
4
snowball(get, advance, increase, promote)
4
spread(advance, increase, raise, rise)
4
stay(support, help, set, boost)
4
steady(fix, reinforce, harden, thicken)
4
swell(charge, advance, increase, develop)
4
tighten(hold, fix, secure, join)
4
unite(hold, charge, secure, join)
4
verify(confirm, story, substantiate, validate)
4
vivify(promote, strength, stimulate, revive)
4
wax(advance, increase, develop, raise)
4
whet(increase, raise, severe, boost)
3
activate(promote, raise, stimulate, restore)
3
aggrandize(advance, increase, develop, raise)
3
arm(fix, power, stimulate, excite)
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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>