1
tone up(verb, expression, support, increase, establish)
1
toughened
1
toughening
1
toughens
1
undergird
1
underline(verb, support, increase, boost, sustain)
1
vitalize
1
wax(verb, support, increase, establish, extend)
1
withstand(verb, keep, overcome, endure, resist)
0
abrade
0
adapt
0
adjust
0
admittedly
0
animate(encourage, restore, strengthen, hearten)
0
assuredly
0
blunt
0
braze(verb, set, harden)
0
buck up(expression, strengthen)
0
buckram
0
bulwark(verb, support, strengthen, reinforce)
11 years ago|4.3k views|share |citing 
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>