ballroom

abloom, assume, backroom, barroom, bathroom, bedroom, boardroom, bridegroom, broadloom, chat room, checkroom, classroom, clean room, cloakroom, coatroom, consume, costume, courtroom, darkroom, dayroom, entomb, enwomb, exhume, foredoom, front room, great room, greenroom, guardroom, gun room, headroom, heirloom, homeroom, houseroom, illume, inhume, jibboom, Khartoum, legroom, legume, lunchroom, men's room, mudroom, mushroom, newsroom, perfume, playroom, poolroom, pressroom, presume, push broom, relume, restroom, resume, salesroom, schoolroom, Scotch broom, sea room, showroom, sickroom, simoom, squad room, stateroom, stockroom, storeroom, strong room, subsume, sunroom, taproom, Targum, tearoom, throne room, toolroom, wardroom, washroom, weight room, whisk broom, white room, workroom