defence reaction vs defense mechanism

defence reaction and defense mechanism both are nouns.

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

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

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

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

defence reaction (noun)	defense 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