3
arm(verb, fix, power, stimulate, excite)
3
ascend(verb, powerful, fortify, brace, reinforce)
3
authorize(verb, reward, inaugurate, dignify, empower)
3
bear out(verb, expression, phrasal verb, encourage, confirm)
3
better(verb, raise, gain, deliver, improve)
3
boom(verb, increase, develop, improve, grow)
3
broaden(verb, advance, increase, raise, rise)
3
buoy(verb, support, help, set, encourage)
3
burgeon(verb, increase, encourage, swell, uphold)
3
case harden(expression, idiom, strength)
3
cement(verb, hold, close, set, fix)
3
comfort(verb, support, develop, promote, encourage)
3
contribute(verb, responsible)
3
double(verb, advance, increase, raise, rise)
3
enforce(verb, empower)
3
equip(verb, make, place, set, fix)
3
escalate(verb, get, advance, increase, develop)
3
expand(verb, charge, advance, increase, develop)
3
extend(verb, advance, increase, develop, raise)
3
fix(verb, form, hold, make, close)
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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>