psychoneurosis vs neurosis

psychoneurosis and neurosis both are nouns.

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

As nouns, psychoneurosis and neurosis are synonyms defined as:

psychoneurosis and neurosis: a mental or personality disturbance not attributable to any known neurological or organic dysfunction

Other synonyms of psychoneurosis include neuroticism.

psychoneurosis (noun)	neurosis (noun)
a mental or personality disturbance not attributable to any known neurological or organic dysfunction	a mental or personality disturbance not attributable to any known neurological or organic dysfunction