| iron(noun, adjective, hard, tough, soft) | |
| knockout | |
| loud(adjective, dull, firm, powerful, healthy) | |
| mighty(adjective, powerful, forceful) | |
| muscular(adjective, built) | |
| noisy(adjective, firm, powerful, healthy) | |
| noticeable | |
| persuasive | |
| protected(verb, adjective, firm, powerful, healthy) | |
| queen(adjective, poor, miserable, inferior, worthless) | |
| reinforced | |
| safe(adjective, firm, powerful, healthy) | |
| secure(verb, adjective, soft, firm, powerful) | |
| severe | |
| sound | |
| stable(adjective, soft, firm, powerful, healthy) | |
| stalwart(adjective, strong, valiant) | |
| stubborn(adjective, soft) | |
| sufficient(adjective, firm, powerful, healthy) | |
| sure(adjective, firm, powerful, healthy) |
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Weak on
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| APA | Smart Define. (2015). weak thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/weak/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "weak thesaurus" https://smartdefine.org/weak/thesaurus/antonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, weak thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/weak/thesaurus/antonyms>. |
| MLA | Smart Define. "weak thesaurus" 6 December 2015. Web. 22 September 2026. <https://smartdefine.org/weak/thesaurus/antonyms> |