Sahara and Sand dune

Sahara noun - The world's largest desert (3,500,000 square miles) in northern Africa.

Sand dune and sahara are semantically related In some cases you can use "Sand dune" instead a noun "Sahara".

Nearby Word: Saharan

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

Sahara and sand dune are semantically related in wasteland topic. You can use "Sahara" instead a noun phrase "Sand dune".