palaeozoology vs palaeobiology

palaeozoology and palaeobiology both are nouns.

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

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

palaeozoology: the study of fossil animals
palaeobiology: a branch of paleontology that deals with the origin and growth and structure of fossil animals and plants as living organisms

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

palaeozoology (noun)	palaeobiology (noun)
the study of fossil animals	a branch of paleontology that deals with the origin and growth and structure of fossil animals and plants as living organisms