rotunda

n type of round building or hall, esp one with a domed roof 圆形建筑物或大厅（尤指有半球形屋顶的）.

roster, rostrum, rosy, rot, rot-gut, rota, rotary, rotate, rotation, rotational, rotatory, rote, rote learning, rotisserie, rotor, rotten, rottenly, rottenness, rotter, rotund, rotundity, rotundly, rouble (also ruble), roue, rouge, rough, rough house, rough luck, rough-and-tumble, rough-hewn, roughage, roughcast, roughen, roughly, roughneck, roughness, roughshod, roulette, round, round and round,