neurosis vs mental disturbance

neurosis and mental disturbance both are nouns.

Word	Noun	Adjective	Verb	Adverb
neurosis	Yes	No	No	No
mental disturbance	Yes	No	No	No

As nouns, mental disturbance is a hypernym of neurosis; that is, mental disturbance is a word with a broader meaning than neurosis:

neurosis: a mental or personality disturbance not attributable to any known neurological or organic dysfunction
mental disturbance: (psychiatry) a psychological disorder of thought or emotion; a more neutral term than mental illness

Other hypernyms of neurosis include disturbance, folie, mental disorder, psychological disorder.

neurosis (noun)	mental disturbance (noun)
a mental or personality disturbance not attributable to any known neurological or organic dysfunction	(psychiatry) a psychological disorder of thought or emotion; a more neutral term than mental illness