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