mental state vs psychological condition

mental state and psychological condition both are nouns.

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

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

mental state and psychological 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 mental condition, psychological state.

mental state (noun)	psychological 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