the 18 hells [8 hot, 8 cold, nyi tshe, nye 'khor] [IW]
the eighteen hells [RY]
the eighteen regions of hell. [def. eight hot, eight cold, nyi tshe, nye 'khor]; the eighteen regions of hell; the eighteen regions of hell. [def. eight hot, eight cold, nyi tshe, nye 'khor [RY]
the 18 hells [IW]