defense reaction vs defence mechanism

defense reaction and defence mechanism both are nouns.

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

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

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

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

defense 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