psychopathology vs defense mechanism

psychopathology and defense mechanism both are nouns.

Word	Noun	Adjective	Verb	Adverb
psychopathology	Yes	No	No	No
defense mechanism	Yes	No	No	No

psychopathology (noun)	defense mechanism (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