Anxiety disorder and Generalized anxiety disorder

Anxiety disorder noun - A cover term for a variety of mental disorders in which severe anxiety is a salient symptom.

Generalized anxiety disorder and anxiety disorder are semantically related. In some cases you can replace phrase "Generalized anxiety disorder" with "Anxiety disorder", this phrases are similar.

Generalized anxiety disorder noun - An anxiety disorder characterized by chronic free-floating anxiety and such symptoms as tension or sweating or trembling or lightheadedness or irritability etc that has lasted for more than six months.

Anxiety disorder and generalized anxiety disorder are semantically related. You can use "Anxiety disorder" instead a noun phrase "Generalized anxiety disorder".