Concourse and Turnout

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

Turnout and concourse are semantically related. In some cases you can use "Turnout" instead a noun "Concourse".

Turnout noun - Attendance for a particular event or purpose (as to vote in an election).

Concourse and turnout are semantically related. Sometimes you can use "Concourse" instead a noun "Turnout".