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

170 entries under verb topic. ×

4
energize(support, increase, sustain, uphold)
4
intensify(support, increase, establish, extend)
4
prop(support, increase, sustain, uphold)
4
steel(support, close, set, fix)
3
calcify(close, set, fix, settle)
3
consolidate(support, close, set, fix)
3
discipline(rough, prepare, scratch, harden)
3
endure(keep, overcome, resist, suffer)
3
fossilize(close, set, fix, settle)
3
gird(support, close, set, fix)
3
nerve(close, set, fix, settle)
3
ossify(close, set, fix, settle)
3
petrify(close, set, fix, settle)
3
vitrify(close, set, fix, settle)
2
amalgamate(close, set, fix, settle)
2
bake(close, set, fix, settle)
2
beef up(expression, phrasal verb, support, increase)
2
bolster(support, increase, establish, extend)
2
cement(close, set, fix, settle)
2
close(set, fix, settle, firm)
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APASmart Define. (2015). toughen thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/toughen/thesaurus/synonyms
ChicagoSmart Define. 2015. "toughen thesaurus" https://smartdefine.org/toughen/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, toughen thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/toughen/thesaurus/synonyms>.
MLASmart Define. "toughen thesaurus" 13 April 2015. Web. 30 September 2026. <https://smartdefine.org/toughen/thesaurus/synonyms>