psychopathy vs mental condition

psychopathy and mental condition both are nouns.

Word	Noun	Adjective	Verb	Adverb
psychopathy	Yes	No	No	No
mental condition	Yes	No	No	No

As nouns, mental condition is a hypernym of psychopathy; that is, mental condition is a word with a broader meaning than psychopathy:

psychopathy: any disease of the mind; the psychological state of someone who has emotional or behavioral problems serious enough to require psychiatric intervention
mental condition: (psychology) a mental condition in which the qualities of a state are relatively constant even though the state itself may be dynamic

Other hypernyms of psychopathy include mental state, psychological condition, psychological state.

psychopathy (noun)	mental condition (noun)
any disease of the mind; the psychological state of someone who has emotional or behavioral problems serious enough to require psychiatric intervention	(psychology) a mental condition in which the qualities of a state are relatively constant even though the state itself may be dynamic