beaufin an over-sophisticated spelling of biffin

• eider duck
• eiders
• eidetic
• eidetically
• eidetics
• eidograph
• eidographs
• eidola
• eidolon
• EIF
• eigen-
• eigen-frequency
• eigenfunction
• eigenfunctions
• eigentone
• eigentones
• eigenvalue
• eigenvalues
• eigenvector
• eigenvectors
• eight
• eight bells
• eight-day
• eighteen
• eighteen-hole