American coot vs mud hen

American coot and mud hen both are nouns.

Word	Noun	Adjective	Verb	Adverb
American coot	Yes	No	No	No
mud hen	Yes	No	No	No

As nouns, American coot and mud hen are synonyms defined as:

Other synonyms of American coot include Fulica americana, marsh hen, water hen.

American coot (noun)	mud hen (noun)
a coot found in North America	a coot found in North America