Synonyms|270Antonyms|105|Broader|3Narrower|13Related|183

80 entries under strengthen topic. ×

3
gird(verb, support, close, set, fix)
2
beef up(verb, expression, phrasal verb, support, increase)
2
bolster(verb, support, increase, establish, extend)
2
empower(verb, support, increase, establish, extend)
2
encourage(verb, restore, hearten)
2
enliven
2
hearten(encourage, restore)
2
shore up(verb, expression, phrasal verb, support, increase)
2
sustain(verb, support, increase, keep, overcome)
2
vivify
1
add fuel to fire(verb, expression, idiom, support, increase)
1
add to(verb, expression, support, increase, boost)
1
augment(verb, support, increase, boost, sustain)
1
back up(verb, expression, support, increase, boost)
1
boost(verb, support, increase, sustain, uphold)
1
brutalize(verb, scratch, harden, roughen)
1
build up(verb, expression, phrasal verb, support, increase)
1
carry(verb, support, increase, boost, sustain)
1
climatize(verb, rough, prepare, adjust)
1
emphasize(verb, support, increase, boost, sustain)
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APASmart Define. (2015). toughen thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/toughen/thesaurus/synonyms
ChicagoSmart Define. 2015. "toughen thesaurus" https://smartdefine.org/toughen/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, toughen thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/toughen/thesaurus/synonyms>.
MLASmart Define. "toughen thesaurus" 13 April 2015. Web. 1 October 2026. <https://smartdefine.org/toughen/thesaurus/synonyms>