neurolinguist vs neuroscientist

neurolinguist and neuroscientist both are nouns.

Word	Noun	Adjective	Verb	Adverb
neurolinguist	Yes	No	No	No
neuroscientist	Yes	No	No	No

As nouns, neuroscientist is a hypernym of neurolinguist; that is, neuroscientist is a word with a broader meaning than neurolinguist:

neurolinguist: someone trained in neuroscience and linguistics who studies brain processes during language production and reception
neuroscientist: a neurobiologist who specializes in the study of the brain

Other hypernyms of neurolinguist include linguist, linguistic scientist.

neurolinguist (noun)	neuroscientist (noun)
someone trained in neuroscience and linguistics who studies brain processes during language production and reception	a neurobiologist who specializes in the study of the brain