grass (noun) ... grass roots (noun)

What kind of noun is grass?

For example, “grass” is a collective noun. In American English, collective nouns almost always take singular verb forms (a formal agreement).

What is grass noun or verb?

verb. grassed; grassing; grasses. Definition of grass (Entry 2 of 3) transitive verb. 1 : to feed (livestock) on grass sometimes without grain or other concentrates.