Related Clues:

• Arena tops
• Noggins
• Bubbletops, e.g.
• Geodesic structures
• Heads, slangily
• Some stadiums
• Field protectors
• Igloos, basically
• Impressive ceilings
• Stadium toppers
• Some stadium features
• Capitols' caps
• Stadium tops
• Gable alternatives
• Semicircular tops