売春 （バイシュン） prostitution

売却 （バイキャク） selling off, disposal by sale, sale

乱売 （ランバイ） selling at a fire-sale price, clearance sale, dumping

転売 （テンバイ） resale

売る （うる） to sell, to betray, to sell out (one's friend, country, etc.), to make (oneself) known, to establish (a reputation) for oneself, to pick (a fight, quarrel, etc.), to provoke, to force on someone

売るほど （うるほど） so many (that one would want to sell some), more than enough, lots, plenty

売れる （うれる） to sell (well), to be well known, to be popular, to be famous