IPA: /ˈmʌniˌmeɪkər/
KK: /ˈmʌniˌmeɪkər/
A person or thing that generates income or profit.
The new app turned out to be a real moneymaker for the company.
Moneymaker → It is formed from "money" (from Old French *moneie*, meaning currency or wealth) and "maker" (from Old English *macian*, meaning to make or create). The word "moneymaker" refers to something or someone that creates or generates money.
Think of someone or something that 'creates' ('maker') 'currency' ('money') — that's why a moneymaker is something that generates wealth.