Synonyms for Multitude (same or very similar meaning)
WordNet sense 1 (a large indefinite number):
battalion, pack, plurality, large numberWordNet sense 2 (a large gathering of people):
concourse, throngWordNet sense 3 (the common people generally):
hoi polloi, mass, masses, people, the great unwashedFrom the ODE community, based on WordNetadd/edit