protuberance

n. 节疤，突出，凸出

protein-rich, protest, Protestant, Protestantism, protestation, protester, protestingly, protocol, proton, protoplasm, prototype, protozoan, protozoon (also protozoan), protract, protracted, protraction, protractor, protrude, protrusion, protrusive, protuberant, proud, proudly, Prov, provable, provably, prove, proven, provenance, provender, proverb, proverbial, proverbially, provide, provide for, provide somebody with, provide sth.for sb., provided, providence, provident,