97 entries under toughen topic. ×
| train(noun, verb, prepare, endure, adjust) | |
| habituate(verb, study, develop, improve, prepare) | |
| nerve(noun, verb, close, set, settle) | |
| callous(verb, close, set, settle, firm) | |
| coarsen(verb, feel, emotions, calcify, thicken) | |
| intensify(verb, support, increase, establish, extend) | |
| support(noun, verb, increase, establish, extend) | |
| adapt(verb, adjust, thicken, stabilize) | |
| adjust(verb, prepare, endure, adapt, thicken) | |
| conform(verb, adjust, adapt, thicken, stabilize) | |
| discipline(verb, study, develop, improve, prepare) | |
| familiarize(verb, prepare, endure, adjust, adapt) | |
| gird(verb, support, close, set, settle) | |
| sustain(verb, support, increase, keep, overcome) | |
| acclimatise | |
| develop(verb, form, study, secure, join) | |
| embitter(verb, thicken, stabilize, season) | |
| empower(verb, support, increase, establish, extend) | |
| naturalize(verb, impulse) | |
| numb(verb, thicken, stabilize, season) |
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| APA | Smart Define. (2016). harden thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/harden/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "harden thesaurus" https://smartdefine.org/harden/thesaurus/synonyms (accessed October 1, 2026). |
| Harvard | Smart Define 2016, harden thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/harden/thesaurus/synonyms>. |
| MLA | Smart Define. "harden thesaurus" 24 March 2016. Web. 1 October 2026. <https://smartdefine.org/harden/thesaurus/synonyms> |