Dune and High ground

Dune noun - A ridge of sand created by the wind; found in deserts or near lakes and oceans.

High ground and dune are semantically related. In some cases you can use "High ground" instead a noun "Dune".

High ground noun - The more favorable condition or position in a competition.

Dune and high ground are semantically related. Sometimes you can use "Dune" instead a noun phrase "High ground".