173 entries under strengthen topic. ×
| multiply(verb, support, increase, establish, extend) | |
| pick up(verb, expression, support, increase, raise) | |
| pillar(verb, support, increase, boost, sustain) | |
| pool(verb, meet, develop, secure, join) | |
| prepare(verb, support, study, develop, improve) | |
| prop up(verb, expression, support, increase, boost) | |
| pull together(verb, expression, meet, join, link) | |
| punch up(verb, expression, support, increase, boost) | |
| rally(encourage, stimulate, restore, refresh) | |
| ready(verb, support, encourage, restore, uphold) | |
| rejuvenate(verb, support, increase, raise, establish) | |
| relate(verb, meet, join, link, connect) | |
| render solid(expression, develop, secure, join) | |
| renew(verb, support, increase, raise, establish) | |
| secure(verb, support, set, develop, settle) | |
| soup up(verb, expression, support, increase, sustain) | |
| stand up for(verb, expression, idiom, support, increase) | |
| starch(verb, close, set, settle, firm) | |
| stay together(verb, expression, meet, join, link) | |
| steady(verb, adjective, place, set, secure) |
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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> |