125 entries under fortify topic. ×

10
develop(verb, form, support, make, dull)
10
heighten(verb, get, fix, advance, increase)
10
rejuvenate(verb, fix, encourage, raise, return)
9
build up(verb, expression, phrasal verb, form, support)
9
gird(verb, form, support, make, close)
9
sustain(verb, support, hold, help, give)
8
rally(verb, get, increase, promote, encourage)
8
renew(verb, fix, encourage, raise, gain)
8
step up(verb, expression, phrasal verb, support, advance)
8
substantiate(verb, encourage, confirm, powerful, story)
8
tone up(verb, expression, phrasal verb, increase, raise)
7
cheer(verb, encourage, raise, delight, stimulate)
7
concentrate(verb, charge, increase, develop, secure)
7
enlarge(verb, support, get, advance, increase)
7
hearten(verb, encourage, raise, delight, excite)
7
inspirit(verb, encourage, raise, delight, stimulate)
6
prepare(verb, support, make, get, charge)
6
ready(verb, support, make, place, fix)
6
set up(verb, expression, phrasal verb, make, fix)
5
add to(verb, expression, support, help, charge)
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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>