psychopathology vs expansive

psychopathology is a noun but expansive is not a noun.

Word	Noun	Adjective	Verb	Adverb
psychopathology	Yes	No	No	No
expansive	No	Yes	No	No

psychopathology (noun)	expansive (noun)
the branch of medicine dealing with the diagnosis and treatment of mental disorders
the branch of psychology concerned with abnormal behavior

psychopathology (adjective)	expansive (adjective)
	able or tending to expand or characterized by expansion
	friendly and open and willing to talk
	marked by exaggerated feelings of euphoria and delusions of grandeur
	of behavior that is impressive and ambitious in scale or scope