palaeozoology vs zoology

palaeozoology and zoology both are nouns.

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

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

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

palaeozoology (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