Dune and Gradient

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

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

Gradient noun - The degree to which something rises up from a position level with the horizon.

Dune and gradient are semantically related. Sometimes you can use "Dune" instead a noun "Gradient".