velvet bent grass vs brown bent

velvet bent grass and brown bent both are nouns.

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

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

velvet bent grass and brown bent: common grass with slender stems and narrow leaves

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

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