Grass roots and Source

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

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

Source noun - A point or place at which something is invented or provided.

Grass roots and source are semantically related. Sometimes you can replace phrase "Grass roots" with "Source", this terms are similar.