お金持ち (okanemochi) means “rich person”

More examples

宝くじに当たって、お金持ちになりました。takara ku ji ni a ta tte o kane mo chi ni na ri ma shi ta

I won the lottery and became rich.

Describes a person whose financial resources are far greater than those needed for an ordinary lifestyle.

金持ちkanemochi: A plain and informal term for a person with a large amount of money.

多くの財産や収入を持つ人。ō ku no zai san ya shū nyū o mo tsu hito

お金持ち (okanemochi) combines お金 (okane, "money") with 持ち (mochi, "having"), forming a noun for a person who has substantial wealth.

Unlike the adjective "rich" in English, お金持ち (okanemochi) is a noun that directly refers to the wealthy person.