Serenoa repens vs saw palmetto

Serenoa repens and saw palmetto both are nouns.

Word	Noun	Adjective	Verb	Adverb
Serenoa repens	Yes	No	No	No
saw palmetto	Yes	No	No	No

As nouns, Serenoa repens and saw palmetto are synonyms defined as:

Serenoa repens and saw palmetto: small hardy clump-forming spiny palm of southern United States

Other synonyms of Serenoa repens include scrub palmetto.

Serenoa repens (noun)	saw palmetto (noun)
small hardy clump-forming spiny palm of southern United States	small hardy clump-forming spiny palm of southern United States