downy bromegrass vs Bromus tectorum

downy bromegrass and Bromus tectorum both are nouns.

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

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

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

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

downy bromegrass (noun)	Bromus tectorum (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