Dotard and Old maid

Dotard noun - An oldster in his dotage; someone whose age has impaired his intellect.

Old maid and dotard are semantically related. in old-fashion person topic. In some cases you can use "Old maid" instead a noun "Dotard".

Old maid noun - An elderly unmarried woman.

Dotard and old maid are semantically related. You can use "Dotard" instead a noun phrase "Old maid".