cheatgrass vs downy bromegrass

cheatgrass and downy bromegrass both are nouns.

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

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

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

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

cheatgrass (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