Bonanza and Cash crop

Bonanza noun - A sudden happening that brings good fortune (as a sudden opportunity to make money).

Cash crop and bonanza are semantically related In some cases you can use "Cash crop" instead a noun "Bonanza".

Cash crop noun - A readily salable crop that is grown and gathered for the market (as vegetables or cotton or tobacco).

Bonanza and cash crop are semantically related in rich harvest topic. You can use "Bonanza" instead a noun phrase "Cash crop".