neurosis vs psychoneurosis

neurosis and psychoneurosis both are nouns.

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

As nouns, neurosis and psychoneurosis are synonyms defined as:

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

Other synonyms of neurosis include neuroticism.

neurosis (noun)	psychoneurosis (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