Concourse and Plug in

Concourse noun - A typically long narrow way connecting parts of a building.

Plug in and concourse are semantically related In some cases you can replace term "Plug in" with "Concourse", this nouns are similar.

Plug in verb - Plug into an outlet.

Concourse and plug in are semantically related in link topic. Sometimes you can use "Concourse" instead a noun "Plug in", if it concerns topics such as connection.