1
ride out(verb, expression, keep, overcome, endure)
1
rise(verb, support, increase, establish, extend)
1
rise above(verb, expression, keep, overcome, endure)
1
rug
1
set up(verb, expression, support, increase, establish)
1
sinew(verb, support, increase, establish, extend)
1
soup up(verb, expression, support, increase, sustain)
1
stand(verb, support, keep, overcome, endure)
1
stand up for(verb, expression, idiom, support, increase)
1
step up(verb, expression, support, increase, establish)
1
stick it out(verb, expression, idiom, keep, overcome)
1
stiffened
1
stroke(verb, support, increase, boost, sustain)
1
substantiate(verb, support, increase, establish, extend)
1
suffer(verb, keep, overcome, endure, resist)
1
supplement(verb, support, increase, boost, sustain)
1
surmount(verb, keep, overcome, endure, resist)
1
survive(verb, keep, overcome, endure, resist)
1
tempering
1
thicken(verb, close, set, fix, settle)
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APASmart Define. (2015). toughen thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/toughen/thesaurus/synonyms
ChicagoSmart Define. 2015. "toughen thesaurus" https://smartdefine.org/toughen/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, toughen thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/toughen/thesaurus/synonyms>.
MLASmart Define. "toughen thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/toughen/thesaurus/synonyms>