delusion vs psychological state

delusion and psychological state both are nouns.

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

As nouns, psychological state is a hypernym of delusion; that is, psychological state is a word with a broader meaning than delusion:

delusion: (psychology) an erroneous belief that is held in the face of evidence to the contrary
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 hypernyms of delusion include mental condition, mental state, psychological condition.

delusion (noun)	psychological state (noun)
the act of deluding; deception by creating illusory ideas	(psychology) a mental condition in which the qualities of a state are relatively constant even though the state itself may be dynamic
a mistaken or unfounded opinion or idea
(psychology) an erroneous belief that is held in the face of evidence to the contrary