Grass roots and Terrain

Grass roots noun - The common people at a local level (as distinguished from the centers of political activity).

Terrain and grass roots are semantically related. In some cases you can use "Terrain" instead a noun phrase "Grass roots".

Terrain noun - A region of activity, knowledge, or influence.

Grass roots and terrain are semantically related. Sometimes you can use "Grass roots" instead a noun "Terrain".