131 entries under strengthen topic. ×

6
underpin(verb, support, hold, continue, stay)
5
back up(verb, expression, phrasal verb, support, increase)
5
harden(verb, support, increase, sustain, uphold)
5
help(noun, verb, support, keep, maintain)
5
stiffen(verb, support, calm, fix, increase)
4
set(verb, support, calm, fix, sustain)
4
toughen(verb, support, increase, sustain, uphold)
3
assist(verb, support, help, keep, maintain)
3
bear up(verb, expression, phrasal verb, support, hold)
3
buoy(verb, support, help, keep, maintain)
3
buoy up(verb, expression, support, maintain, promote)
3
invigorate
3
stabilize(verb, calm, fix, keep)
3
steel(verb, support, fix, secure, ready)
3
temper
2
beef up(verb, expression, support, increase, sustain)
2
boost(verb, support, help, increase, maintain)
2
cushion(verb, support, help, boost, sustain)
2
energize(verb, support, increase, sustain, uphold)
2
finance(verb, maintain, encourage, raise, back)
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APASmart Define. (2015). prop thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/prop/thesaurus/synonyms
ChicagoSmart Define. 2015. "prop thesaurus" https://smartdefine.org/prop/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, prop thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/prop/thesaurus/synonyms>.
MLASmart Define. "prop thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/prop/thesaurus/synonyms>