zoological vs zoology

zoological is not a noun while zoology is a noun.

Word	Noun	Adjective	Verb	Adverb
zoological	No	Yes	No	No
zoology	Yes	No	No	No

zoological (noun)	zoology (noun)
	the branch of biology that studies animals
	all the animal life in a particular region or period

zoological (adjective)	zoology (adjective)
of or relating to animals or animal groups
concerning the study of animals and their classification and properties