fauna vs registered

fauna is a noun but registered is not a noun.

Word	Noun	Adjective	Verb	Adverb
fauna	Yes	No	No	No
registered	No	Yes	No	No

fauna (noun)	registered (noun)
a living organism characterized by voluntary movement
all the animal life in a particular region or period

fauna (adjective)	registered (adjective)
	listed or recorded officially
	(of animals) officially recorded with or certified by a recognized breed association; especially in a stud book
	(of a boat or vessel) furnished with necessary official documents specifying ownership etc