guayule vs Parthenium argentatum

guayule and Parthenium argentatum both are nouns.

Word	Noun	Adjective	Verb	Adverb
guayule	Yes	No	No	No
Parthenium argentatum	Yes	No	No	No

As nouns, guayule and Parthenium argentatum are synonyms defined as:

guayule and Parthenium argentatum: much-branched subshrub with silvery leaves and small white flowers of Texas and northern Mexico; cultivated as a source of rubber

guayule (noun)	Parthenium argentatum (noun)
much-branched subshrub with silvery leaves and small white flowers of Texas and northern Mexico; cultivated as a source of rubber	much-branched subshrub with silvery leaves and small white flowers of Texas and northern Mexico; cultivated as a source of rubber