abacus /abˈə-kəs/

1. A counting frame, consisting of horizontal rods along which movable beads can be slid
2. A level tablet on the capital of a column, supporting the entablature (architecture)

• trucages
• truce
• truce-breaker
• truce-breakers
• truceless
• Truce of God
• truces
• truchman
• truchmans
• truchmen
• trucial
• Trucial States
• truck
• truckage
• truckages
• trucked
• trucker
• truckers
• truck-farm
• truck-farmer
• truck-farmers
• truck-farming
• truck-farms
• truckie
• truckies