Posttraumatic stress disorder and Shell-shock

Posttraumatic stress disorder noun - An anxiety disorder associated with serious traumatic events and characterized by such symptoms as survivor guilt, reliving the trauma in dreams, numbness and lack of involvement with reality, or recurrent thoughts and images.

Shell-shock and posttraumatic stress disorder are semantically related in condition following trauma topic. In some cases you can use "Shell-shock" instead a noun phrase "Posttraumatic stress disorder".

Posttraumatic stress disorder and shell-shock are semantically related in battle fatigue topic. You can use "Posttraumatic stress disorder" instead a noun phrase "Shell-shock".