mental state vs mental condition

mental state and mental condition both are nouns.

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

As nouns, mental state and mental condition are synonyms defined as:

mental state and 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 synonyms of mental state include psychological condition, psychological state.

mental state (noun)	mental condition (noun)
(psychology) a mental condition in which the qualities of a state are relatively constant even though the state itself may be dynamic	(psychology) a mental condition in which the qualities of a state are relatively constant even though the state itself may be dynamic