11
empower(verb, power, encourage, stimulate, excite)
11
temper(verb, close, set, fix, encourage)
10
boost(verb, support, get, help, advance)
10
deepen(verb, advance, increase, raise, rise)
10
develop(verb, form, support, make, dull)
10
heighten(verb, get, fix, advance, increase)
10
prop(verb, support, hold, help, fix)
10
refresh(verb, fix, promote, encourage, raise)
10
rejuvenate(verb, fix, encourage, raise, return)
10
shore up(verb, expression, phrasal verb, support, help)
9
augment(verb, support, get, help, advance)
9
back(verb, support, open, keep, develop)
9
back up(verb, expression, phrasal verb, support, increase)
9
beef up(verb, expression, phrasal verb, support, increase)
9
build up(verb, expression, phrasal verb, form, support)
9
consolidate(verb, support, close, set, fix)
9
gird(verb, form, support, make, close)
9
improve(verb, support, fix, increase, develop)
9
magnify(verb, get, advance, increase, develop)
9
sustain(verb, support, hold, help, give)
10 years ago|19k views|share |citing 
APASmart Define. (2016). strengthen thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/strengthen/thesaurus/synonyms
ChicagoSmart Define. 2016. "strengthen thesaurus" https://smartdefine.org/strengthen/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, strengthen thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/strengthen/thesaurus/synonyms>.
MLASmart Define. "strengthen thesaurus" 3 March 2016. Web. 26 September 2026. <https://smartdefine.org/strengthen/thesaurus/synonyms>