bluestem vs Andropogon gerardii

bluestem and Andropogon gerardii both are nouns.

Word	Noun	Adjective	Verb	Adverb
bluestem	Yes	No	No	No
Andropogon gerardii	Yes	No	No	No

As nouns, bluestem and Andropogon gerardii are synonyms defined as:

bluestem and Andropogon gerardii: tall grass with smooth bluish leaf sheaths grown for hay in the United States

Other synonyms of bluestem include Andropogon furcatus, blue stem.

bluestem (noun)	Andropogon gerardii (noun)
tall grass with smooth bluish leaf sheaths grown for hay in the United States	tall grass with smooth bluish leaf sheaths grown for hay in the United States