ethology vs zoology

ethology and zoology both are nouns.

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

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

ethology: the branch of zoology that studies the behavior of animals in their natural habitats
zoology: the branch of biology that studies animals

Other hypernyms of ethology include zoological science.

ethology (noun)	zoology (noun)
the branch of zoology that studies the behavior of animals in their natural habitats	the branch of biology that studies animals
	all the animal life in a particular region or period