Concourse
Part of speech: noun
Definition: A large open space in a building where people can gather. A large group of people; a crowd. The running or flowing together of things; the meeting of things; confluence.
Multitude
Part of speech: noun
Definition: A great amount or number, often of people.The mass of ordinary people; the populous or the masses
Example sentence: Mankind, the spirit of the earth, the synthesis of individuals and peoples, the paradoxical conciliation of the element with the whole, and of unity with multitude - all these are called Utopian, and yet they are biologically necessary.