| Main Entry: | |
| Part of Speech: | noun |
| Definition: | feebleness, old age |
| Synonyms: | advanced age, decrepitude, elderliness, fatuity, imbecility, infirmity, second childhood, senectitude, senility, weakness |
| Antonyms: | childhood, strength, youngness, youth, youthfulness |
| Main Entry: | senility |
| Part of Speech: | noun |
| Definition: | old age |
| Synonyms: | age, anility, decline, dotage, feebleness, second childhood, senectitude, senescence |
| Antonyms: | adolescence, childhood, infancy, youth |
| Main Entry: | senectitude |
| Part of Speech: | noun |
| Definition: | old age |
| Synonyms: | advanced age, agedness, decrepitude, elderliness, fatuity, imbecility, infirmity, second childhood, senescence, senility, weakness*, year |
| Main Entry: | senescence |
| Part of Speech: | noun |
| Definition: | old age |
| Synonyms: | advanced age, agedness, decrepitude, elderliness, fatuity, imbecility, infirmity, second childhood, senectitude, senility, weakness*, year |