paleozoology vs zoology

paleozoology and zoology both are nouns.

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

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

Other hypernyms of paleozoology include palaeobiology, paleobiology, zoological science.

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