• 貨幣かへい — money; currency
• 通貨つうか — currency (in circulation)
• 外貨がいか — foreign currency
• 金貨きんか — gold coin
• 貨物かもつ — freight; cargo
• 硬貨こうか — coin
• 貨車かしゃ — freight car (rail)

貨 is a 形声けいせい character: it combines 貝 (money/shell) and 化 (phonetic element). Originally signifying valuable goods, its modern usage refers broadly to items of trade or money.