bromegrass vs brome

bromegrass and brome both are nouns.

Word	Noun	Adjective	Verb	Adverb
bromegrass	Yes	No	No	No
brome	Yes	No	No	No

As nouns, bromegrass and brome are synonyms defined as:

bromegrass and brome: any of various woodland and meadow grasses of the genus Bromus; native to temperate regions

bromegrass (noun)	brome (noun)
any of various woodland and meadow grasses of the genus Bromus; native to temperate regions	any of various woodland and meadow grasses of the genus Bromus; native to temperate regions