biologist vs life scientist

biologist and life scientist both are nouns.

Word	Noun	Adjective	Verb	Adverb
biologist	Yes	No	No	No
life scientist	Yes	No	No	No

As nouns, biologist and life scientist are synonyms defined as:

biologist and life scientist: (biology) a scientist who studies living organisms

biologist (noun)	life scientist (noun)
(biology) a scientist who studies living organisms	(biology) a scientist who studies living organisms