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)

• nightward
• night-watch
• night-watches
• night-watchman
• night-watchmen
• nightwear
• nightwears
• night-work
• night-worker
• night-workers
• night-works
• nighty
• nig-nog
• nig-nogs
• nigrescence
• nigrescences
• nigrescent
• nigricant
• nigrified
• nigrifies
• nigrify
• nigrifying
• Nigritian
• nigritude
• nigritudes