downy brome vs downy bromegrass

downy brome and downy bromegrass both are nouns.

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

As nouns, downy brome and downy bromegrass are synonyms defined as:

downy brome and downy bromegrass: annual or winter annual grass with softly hairy leaves of the Mediterranean

Other synonyms of downy brome include Bromus tectorum, cheatgrass, downy cheat, downy chess, drooping brome.

downy brome (noun)	downy bromegrass (noun)
annual or winter annual grass with softly hairy leaves of the Mediterranean	annual or winter annual grass with softly hairy leaves of the Mediterranean