Comic book and Written material

Comic book noun - A magazine devoted to comic strips.

Written material and comic book are semantically related In some cases you can use "Written material" instead a noun phrase "Comic book".

Written material noun - The work of a writer; anything expressed in letters of the alphabet (especially when considered from the point of view of style and effect).

Comic book and written material are semantically related in account of event or proceedings topic. Sometimes you can use "Comic book" instead a noun phrase "Written material".