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)

• feather bed
• featherbed
• featherbedded
• featherbedding
• featherbeddings
• feather beds
• featherbeds
• feather-boarding
• feather-bonnet
• feather-bonnets
• feather-brain
• feather-brained
• feather-brains
• feather cut
• feather cuts
• feather duster
• feather dusters
• feathered
• feathered friend
• feather-edge
• feather-edges
• feather-grass
• feather-head
• feather-headed
• featherier