170 entries under verb topic. ×

2
concrete(close, set, firm, dry)
2
congeal(close, set, fix, settle)
2
contract(close, set, fix, settle)
2
crystallize(close, set, fix, settle)
2
densify(close, set, fix, settle)
2
empower(support, increase, establish, extend)
2
encourage(restore, strengthen, hearten)
2
enhance(support, increase, establish, extend)
2
enliven
2
firm(close, set, fix, settle)
2
fix(close, set, settle, firm)
2
hardened
2
precipitate(close, set, fix, settle)
2
press(close, set, fix, settle)
2
rejuvenate(support, increase, encourage, establish)
2
set(support, close, fix, settle)
2
settle(close, set, fix, firm)
2
shore up(expression, phrasal verb, support, increase)
2
solidify(close, set, fix, settle)
2
starch(close, set, fix, settle)
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APASmart Define. (2015). toughen thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/toughen/thesaurus/synonyms
ChicagoSmart Define. 2015. "toughen thesaurus" https://smartdefine.org/toughen/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, toughen thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/toughen/thesaurus/synonyms>.
MLASmart Define. "toughen thesaurus" 13 April 2015. Web. 29 September 2026. <https://smartdefine.org/toughen/thesaurus/synonyms>