defence mechanism vs psychopathology

defence mechanism and psychopathology both are nouns.

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

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