defence mechanism vs defence reaction

defence mechanism and defence reaction both are nouns.

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

As nouns, defence mechanism and defence reaction are synonyms defined as:

defence mechanism and defence reaction: (psychiatry) an unconscious process that tries to reduce the anxiety associated with instinctive desires

Other synonyms of defence mechanism include defence, defense, defense mechanism, defense reaction.

defence mechanism (noun)	defence reaction (noun)
(psychiatry) an unconscious process that tries to reduce the anxiety associated with instinctive desires	(psychiatry) an unconscious process that tries to reduce the anxiety associated with instinctive desires