natural scientist vs naturalist

natural scientist and naturalist both are nouns.

Word	Noun	Adjective	Verb	Adverb
natural scientist	Yes	No	No	No
naturalist	Yes	No	No	No

As nouns, natural scientist and naturalist are synonyms defined as:

natural scientist and naturalist: a biologist knowledgeable about natural history (especially botany and zoology)

natural scientist (noun)	naturalist (noun)
a biologist knowledgeable about natural history (especially botany and zoology)	a biologist knowledgeable about natural history (especially botany and zoology)
	an advocate of the doctrine that the world can be understood in scientific terms