defence mechanism vs defense reaction

defence mechanism and defense reaction both are nouns.

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

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

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

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

defence mechanism (noun)	defense 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