naturalist vs zoological science

naturalist and zoological science both are nouns.

Word	Noun	Adjective	Verb	Adverb
naturalist	Yes	No	No	No
zoological science	Yes	No	No	No

naturalist (noun)	zoological science (noun)
a biologist knowledgeable about natural history (especially botany and zoology)	the branch of biology that studies animals
an advocate of the doctrine that the world can be understood in scientific terms