- Definitions|2
- Thesaurus|574
- Abbreviations|0
| tone up(verb, expression, support, increase, establish) | |
| toughened | |
| toughening | |
| toughens | |
| undergird | |
| underline(verb, support, increase, boost, sustain) | |
| vitalize | |
| wax(verb, support, increase, establish, extend) | |
| withstand(verb, keep, overcome, endure, resist) | |
| abrade | |
| adapt | |
| adjust | |
| admittedly | |
| animate(encourage, restore, strengthen, hearten) | |
| assuredly | |
| blunt | |
| braze(verb, set, harden) | |
| buck up(expression, strengthen) | |
| buckram | |
| bulwark(verb, support, strengthen, reinforce) |
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| APA | Smart Define. (2015). toughen thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/toughen/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "toughen thesaurus" https://smartdefine.org/toughen/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, toughen thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/toughen/thesaurus/synonyms>. |
| MLA | Smart Define. "toughen thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/toughen/thesaurus/synonyms> |