defence reaction vs defence mechanism

defence reaction and defence mechanism both are nouns.

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

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

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

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

defence reaction (noun)	defence mechanism (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