psychoneurosis vs neuroticism

psychoneurosis and neuroticism both are nouns.

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

As nouns, psychoneurosis and neuroticism are synonyms defined as:

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

Other synonyms of psychoneurosis include neurosis.

psychoneurosis (noun)	neuroticism (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