become, benumb, Brum, bum, chum, crumb, drum, glum, gum, ho-hum, hum, Kara Kum, lum, mum, numb, plum, plumb, Rhum, rhumb, rum, scrum, scum, slum, some, strum, stum, succumb, sum, thrum, thumb, tum, yum-yum