drooping brome vs Bromus tectorum

drooping brome and Bromus tectorum both are nouns.

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

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

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

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

drooping brome (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