unattached vs fauna

unattached is not a noun while fauna is a noun.

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

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

unattached (adjective)	fauna (adjective)
not associated in an exclusive sexual relationship
not fastened together
(of animals) able to swim about; not attached