cleithral or clithral /klīˈthrəl/

Completely roofed over

• trihybrids
• trihydric
• triiodothyronine
• tri-jet
• tri-jets
• trike
• trikes
• trilateral
• trilateralism
• trilateralisms
• trilateralist
• trilateralists
• trilaterally
• trilaterals
• trilateration
• trilaterations
• trilbies
• trilby
• trilby hat
• trilbys
• trild
• trilemma
• trilemmas
• Trilene
• trilinear