| failing(noun, drop, fall, weakness, fault) | |
| faintness(noun, weakness, fault, lack, lapse) | |
| falling off(noun, expression, drop, fall, deterioration) | |
| fault(noun, weakness, lack, lapse, failing) | |
| flimsiness(noun, weakness, delicacy, inadequacy, shakiness) | |
| folie du doute(expression, idiom) | |
| fondness(noun, weakness, fault, lack, lapse) | |
| frailness(noun, weakness, delicacy, inadequacy, shakiness) | |
| functional psychosis | |
| gap(noun, weakness, fault, lack, lapse) | |
| general paralysis | |
| general paresis | |
| golden age(life, period, age) | |
| great age | |
| grey hairs(life, period, age) | |
| hale old age(expression, idiom) | |
| hoary eld | |
| impairment(noun, weakness, fault, lack, lapse) | |
| imperfection(noun, weakness, fault, lack, lapse) | |
| impotence(noun, weakness, fault, lack, lapse) |
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| APA | Smart Define. (2015). senility thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/senility/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "senility thesaurus" https://smartdefine.org/senility/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, senility thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/senility/thesaurus/synonyms>. |
| MLA | Smart Define. "senility thesaurus" 23 December 2015. Web. 22 September 2026. <https://smartdefine.org/senility/thesaurus/synonyms> |