psychoneurosis vs disturbance

psychoneurosis and disturbance both are nouns.

Word	Noun	Adjective	Verb	Adverb
psychoneurosis	Yes	No	No	No
disturbance	Yes	No	No	No

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

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

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

psychoneurosis (noun)	disturbance (noun)
a mental or personality disturbance not attributable to any known neurological or organic dysfunction	the act of disturbing something or someone; setting something in motion
	a noisy fight
	activity that is a malfunction, intrusion, or interruption
	electrical or acoustic activity that can disturb communication
	a disorderly outburst or tumult
	(psychiatry) a psychological disorder of thought or emotion; a more neutral term than mental illness
	an unhappy and worried mental state