1、那到不一定说有多少个，在我的知识范围内，大概有raw rabble rabbit rabies race raccoon rack racismracket racketeer racon racoon racquet rad racy radar radial radiation radiator radicle radill radio radish radius radix radon raffia radwaster raffle raft rafter rag raga rage raglan ragout ragweed rai raid rail rain rains rainy raiser raj rake realy ram rally ramp。

2、还应该有好多没出现过的，那就不好说到底有多少个了！