Countercurrent and Turbulency

Countercurrent noun - A stretch of turbulent water in a river or the sea caused by one current flowing into or across another current.

Turbulency and countercurrent are semantically related. In some cases you can use "Turbulency" instead a noun "Countercurrent".

Turbulency noun - Unstable flow of a liquid or gas.

Countercurrent and turbulency are semantically related. Sometimes you can replace term "Countercurrent" with "Turbulency", this nouns are similar.