velvet bent grass vs Rhode Island bent

velvet bent grass and Rhode Island bent both are nouns.

Word	Noun	Adjective	Verb	Adverb
velvet bent grass	Yes	No	No	No
Rhode Island bent	Yes	No	No	No

As nouns, velvet bent grass and Rhode Island bent are synonyms defined as:

velvet bent grass and Rhode Island bent: common grass with slender stems and narrow leaves

Other synonyms of velvet bent grass include Agrostis canina, brown bent, dog bent, velvet bent.

velvet bent grass (noun)	Rhode Island bent (noun)
common grass with slender stems and narrow leaves	common grass with slender stems and narrow leaves