Related Clues:
- Semicircular roofs
- Rainout insurance of a sort
- Stadium protectors
- Rain delay sheets
- Rainy-day covers
- Ballgame rain checks
- Some Super Bowl venues
- Woodpile coverings
- Inverted-bowl shapes
- Staples of Byzantine architecture
- Rotunda features
- Kremlin features
- Igloo shapes
- Capitol tops
- Parts of a Jerusalem skyline