Is there a difference between alzheimer's and dementia? i'm confused about whether the terms alzheimer's and dementia are interchangeable. is there's a difference?

They : They are not exactly the same. Dementia is a broad term that means your brain's thinking ability has diminished. Many different diseases cause dementia, one of which is alzheimer's disease. Other causes are strokes, genetic defects, nutritional deficiencies, or brain damage. But we always hear about alzheimer's because it is the most common by far. What makes alzheimer's different is that there are certain symptoms it causes, and because it produces some characteristic changes inside the cells.

A type of dementia: Alzheimer's disease is one of many types of dementias.

Related: Everyone wih alzheimer's has dementia but there are also other less common types of dementia.