umquhile or umwhile /umˈhwīl/ (archaic, chiefly Scot)

(at) one time, former(ly)

• cofferdam
• cofferdams
• coffered
• coffer-fish
• coffering
• coffers
• coffin
• coffin bone
• coffin bones
• coffin-dodger
• coffin-dodgers
• coffined
• coffing
• coffining
• coffinite
• coffinites
• coffin nail
• coffin nails
• coffins
• coffin ship
• coffin ships
• coffle
• coffles
• coffret
• coffrets