173 entries under strengthen topic. ×
| galvanize(stimulate, refresh, revitalize) | |
| garrison(verb, support, reinforce) | |
| grit teeth(expression, toughen) | |
| hearten(encourage, restore, toughen) | |
| make difficult | |
| make stronger(verb, expression, support, powerful) | |
| prepare oneself(expression, toughen) | |
| protect(verb, support, reinforce) | |
| tauten(verb, steady, reinforce, thicken) | |
| tense(verb, steady, reinforce, thicken) | |
| tensed(reinforce, jellied, gel, calcify) | |
| tensing(reinforce, jellied, gel, calcify) | |
| underpin |
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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> |