Chatroom and Web site

Chatroom noun - A site on the internet where a number of users can communicate in real time (typically one dedicated to a particular topic).

Web site and chatroom are semantically related. In some cases you can use "Web site" instead a noun "Chatroom".

Web site noun - A computer connected to the internet that maintains a series of web pages on the World Wide Web.

Chatroom and web site are semantically related. Sometimes you can replace term "Chatroom" with "Web site", this terms are similar.