Bromus tectorum vs downy brome

Bromus tectorum and downy brome both are nouns.

Word	Noun	Adjective	Verb	Adverb
Bromus tectorum	Yes	No	No	No
downy brome	Yes	No	No	No

As nouns, Bromus tectorum and downy brome are synonyms defined as:

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

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

Bromus tectorum (noun)	downy brome (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