room-mate

n person living in the same room or set of rooms as another, eg in a college or lodgings 同住一室的人（如学校或寄宿舍中的）.

Romany, Rome, romp, rompers, Ronald Reagan, rondo, rontgen, rood, rood-screen, roof, roof-garden, roof-rack (also `luggage-rack), roof-top, roof-tree, roofing, rook, rookery, rookie, room, room service, roomer, roomful, roominess, rooming-house, roomy, roost, rooster, root, root beer, root vegetable, root-crop, rooted, rootless, rootlessness, rope, rope ladder, rope-ladder, ropiness, ropy (also ropey), Roquefort,