mental state vs psychological state

mental state and psychological state both are nouns.

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

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

mental state and psychological state: (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 condition.

mental state (noun)	psychological state (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