8
nerve(verb, close, set, fix, encourage)
8
promote(verb, support, get, increase, develop)
8
rally(verb, get, increase, promote, encourage)
8
renew(verb, fix, encourage, raise, gain)
8
spike(verb, increase, raise, severe, boost)
8
step up(verb, expression, phrasal verb, support, advance)
8
stiffen(verb, support, dull, close, set)
8
substantiate(verb, encourage, confirm, powerful, story)
8
tone up(verb, expression, phrasal verb, increase, raise)
8
vitalize(verb, promote, stimulate, excite, animate)
7
amplify(verb, get, advance, increase, develop)
7
authenticate(verb, confirm, story, verify, substantiate)
7
cheer(verb, encourage, raise, delight, stimulate)
7
concentrate(verb, charge, increase, develop, secure)
7
enlarge(verb, support, get, advance, increase)
7
enliven(verb, encourage, raise, delight, stimulate)
7
excite(verb, open, start, promote, encourage)
7
hearten(verb, encourage, raise, delight, excite)
7
inspirit(verb, encourage, raise, delight, stimulate)
7
lace(verb, hold, secure, join, fasten)
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APASmart Define. (2016). strengthen thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/strengthen/thesaurus/synonyms
ChicagoSmart Define. 2016. "strengthen thesaurus" https://smartdefine.org/strengthen/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, strengthen thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/strengthen/thesaurus/synonyms>.
MLASmart Define. "strengthen thesaurus" 3 March 2016. Web. 27 September 2026. <https://smartdefine.org/strengthen/thesaurus/synonyms>