expansive vs psychopathology

expansive is not a noun while psychopathology is a noun.

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

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

expansive (adjective)	psychopathology (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