Geek and Has-been

Geek noun - A person slavishly devoted to intellectual or academic pursuits.

Has-been and geek are semantically related. In some cases you can use "Has-been" instead a noun "Geek".

Has-been noun - One that has passed the peak of effectiveness or popularity.

Geek and has-been are semantically related. Sometimes you can use "Geek" instead a noun phrase "Has-been".