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)

• fletching
• fletchings
• fletton
• flettons
• fleur
• fleur de coin
• fleur-de-lis
• fleur-de-lys
• fleuret
• fleurets
• fleurette
• fleuron
• fleurons
• fleurs
• fleurs-de-lis
• fleurs-de-lys
• fleury
• flew
• flewed
• flews
• flex
• flexed
• flexes
• flex-fuel
• flexi-