anhedonia vs mental condition

anhedonia and mental condition both are nouns.

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

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

anhedonia: an inability to experience pleasure
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 anhedonia include mental state, psychological condition, psychological state.

anhedonia (noun)	mental condition (noun)
an inability to experience pleasure	(psychology) a mental condition in which the qualities of a state are relatively constant even though the state itself may be dynamic