quatrefoil /katˈər-foil or katˈrə-foil/ or quatrefeuille /-fœ-ē or -fīl/

1. A four-petalled flower or leaf of four leaflets
2. An openwork design or ornament divided by cusps into four lobes (architecture)

• usernames
• users
• uses
• use up
• USGA
• U-shaped
• usher
• ushered
• usheress
• usheresses
• usherette
• usherettes
• ushering
• usherings
• ushers
• vegetative nervous system
• vegetativeness
• vegetativenesses
• vegetative organs
• vegetative reproduction
• vegete
• vegetive
• vegetives
• vegged
• vegges