colosseum (n.)

• agora
• amphitheater
• arena
• auditorium
• background
• bowl
• campus
• canvas
• circus
• cockpit
• coliseum
• course
• field
• floor
• forum
• ground
• gym
• gymnasium
• hall
• hippodrome
• locale
• marketplace
• mat
• milieu
• palaestra
• pit
• place
• platform
• precinct
• purlieu
• range
• ring
• scene
• scenery
• setting
• site
• sphere
• stadium
• stage
• terrain
• theater
• tiltyard
• walk