brown bent vs velvet bent grass

brown bent and velvet bent grass both are nouns.

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

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

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

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

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