zoology vs biology

zoology and biology both are nouns.

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

As nouns, biology is a hypernym of zoology; that is, biology is a word with a broader meaning than zoology:

Other hypernyms of zoology include biological science.

zoology (noun)	biology (noun)
the branch of biology that studies animals	the science that studies living organisms
all the animal life in a particular region or period	all the plant and animal life of a particular region
	characteristic life processes and phenomena of living organisms