Backwash and Backflow

Backwash noun - A condition or occurrence traceable to a cause.

Backflow and backwash are semantically related in wake topic. In some cases you can use "Backflow" instead a noun "Backwash", when it comes to topics like reverse flow, return flow.

Backflow noun - A flow that returns toward its source.

Backwash and backflow are semantically related in reverse flow topic. You can use "Backwash" instead a noun "Backflow", if it concerns topics such as return flow.