Alzheimer's disease and Decrepitude

Alzheimer's disease noun - A progressive form of presenile dementia that is similar to senile dementia except that it usually starts in the 40s or 50s; first symptoms are impaired memory which is followed by impaired thought and speech and finally complete helplessness.

Decrepitude and Alzheimer's disease are semantically related. In some cases you can use "Decrepitude" instead a noun phrase "Alzheimer's disease".

Decrepitude noun - A state of deterioration due to old age or long use.

Alzheimer's disease and decrepitude are semantically related. You can use "Alzheimer's disease" instead a noun "Decrepitude".