ram

n.公羊；撞，锤，捣 v.捣，撞击

raincoat, raindrop, rainfall, rainforest, rainless, rainproof, rainy, raise, raise...out of, raisin, raison d'etre, raj, rajah (also raja), rake, rake-off, rakish, rakishly, rakishness, rallentando, rally, ram-jet, Ramadan, ramble, rambler, rambling, rambunctious, ramekin, ramification, ramify, ramp, rampage, rampant, rampantly, rampart, ramrod, ramshackle, ran, ranch, rancher, rancid,