Parthenium argentatum vs guayule

Parthenium argentatum and guayule both are nouns.

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

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

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

Parthenium argentatum (noun)	guayule (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