Here's what rhymes with auditorium.

Consider these alternatives

hall / all halls / force auditoriums / historians amphitheater / theater theater / theatre renovated / dated ballroom / storeroom cafeteria / criteria venue / menu foyer / employer seating / meeting spacious / basis room / whom theatre / theater hallway / doorway gym / him stadium / radium amphitheatre / theater memorial / editorial proscenium / millennium chapel / battle downtown / down