rivalry

n.竞争，对抗

ripple, rise, rise superior to, riser, risible, rising, rising damp, rising fives, risk, riskily, riskiness, risky, risotto, risque, rissole, rite, ritual, ritualize, ritzy, rival, rive, riven, river, river bed, river-bed, riverside, rivet, riveter, riveting, Riviera, rivulet, riyal, rly, RM, RN, RNA, RNIB, RNLI, roach, road,