momentum /mō-menˈtəm/

1. The quantity of motion in a body measured by the product of mass and velocity
2. Force of motion gained in movement, impetus (informal)

• top-dress
• top-dressed
• top-dresses
• top dressing
• top-dressing
• top dressings
• tope
• topectomies
• topectomy
• toped
• topee
• topees
• topek
• top-end
• toper
• to perfection
• topers
• topes
• top flight
• top-flight
• topfull
• topgallant
• topgallants
• top gear
• top gears