brome vs bromegrass

brome and bromegrass both are nouns.

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

As nouns, brome and bromegrass are synonyms defined as:

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

brome (noun)	bromegrass (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