psychological science vs abnormal

psychological science is a noun but abnormal is not a noun.

Word	Noun	Adjective	Verb	Adverb
psychological science	Yes	No	No	No
abnormal	No	Yes	No	No

psychological science (noun)	abnormal (noun)
the science of mental life

psychological science (adjective)	abnormal (adjective)
	not normal; not typical or usual or regular or conforming to a norm
	departing from the normal in e.g. intelligence and development
	much greater than the normal