astrodome /asˈtrə-dōm/

1. A small transparent observation dome on the top of the fuselage of an aeroplane, for astronomical observations
2. A sports centre covered by a huge translucent dome, orig one at Houston, Texas

• threepeated
• threepeating
• threepeats
• threepence
• threepences
• threepenceworth
• threepennies
• threepennorth
• threepenny
• threepenny bit
• threepenny piece
• threepennyworth
• three-per-cents
• three-phase
• three-piece
• three-pieces
• three-pile
• three-piled
• three-piles
• threeping
• threepit
• three-plies
• three-ply
• three-point landing
• three-point landings