psychopathology vs defence reaction

psychopathology and defence reaction both are nouns.

Word	Noun	Adjective	Verb	Adverb
psychopathology	Yes	No	No	No
defence reaction	Yes	No	No	No

psychopathology (noun)	defence reaction (noun)
the branch of medicine dealing with the diagnosis and treatment of mental disorders	(psychiatry) an unconscious process that tries to reduce the anxiety associated with instinctive desires
the branch of psychology concerned with abnormal behavior