mental disturbance vs psychopathology

mental disturbance and psychopathology both are nouns.

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

mental disturbance (noun)	psychopathology (noun)
(psychiatry) a psychological disorder of thought or emotion; a more neutral term than mental illness	the branch of medicine dealing with the diagnosis and treatment of mental disorders
	the branch of psychology concerned with abnormal behavior