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

(at) one time, former(ly)

• blistered
• blistered-steel
• blister fly
• blisterier
• Boolean
• Boolean algebra
• Boolean algebras
• Boolean expression
• Boolean expressions
• boom
• boom and bust
• boombox
• boomboxes
• boomed
• boomer
• boomerang
• boomeranged
• boomeranging
• boomerangs
• boomers
• boomier
• boomiest
• booming
• boomings
• boom-iron