bent grass vs bent

bent grass and bent both are nouns.

Word	Noun	Adjective	Verb	Adverb
bent grass	Yes	No	No	No
bent	Yes	Yes	No	No

As nouns, bent grass and bent are synonyms defined as:

bent grass and bent: grass for pastures and lawns especially bowling and putting greens

Other synonyms of bent grass include bent-grass.

bent grass (noun)	bent (noun)
grass for pastures and lawns especially bowling and putting greens	a special way of doing something
	a relatively permanent inclination to react in a particular way
	an area of grassland unbounded by fences or hedges
	grass for pastures and lawns especially bowling and putting greens

bent grass (adjective)	bent (adjective)
	of metal e.g.
	fixed in your purpose
	used of the back and knees; stooped