American coot vs Fulica americana

American coot and Fulica americana both are nouns.

Word	Noun	Adjective	Verb	Adverb
American coot	Yes	No	No	No
Fulica americana	Yes	No	No	No

As nouns, American coot and Fulica americana are synonyms defined as:

Other synonyms of American coot include marsh hen, mud hen, water hen.

American coot (noun)	Fulica americana (noun)
a coot found in North America	a coot found in North America