naturalist vs natural scientist

naturalist and natural scientist both are nouns.

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

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

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

naturalist (noun)	natural scientist (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