isolation vs defence mechanism

isolation and defence mechanism both are nouns.

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

As nouns, defence mechanism is a hypernym of isolation; that is, defence mechanism is a word with a broader meaning than isolation:

isolation: (psychiatry) a defense mechanism in which memory of an unacceptable act or impulse is separated from the emotion originally associated with it
defence mechanism: (psychiatry) an unconscious process that tries to reduce the anxiety associated with instinctive desires

Other hypernyms of isolation include defence, defence reaction, defense, defense mechanism, defense reaction.

isolation (noun)	defence mechanism (noun)
the act of isolating something; setting something apart from others	(psychiatry) an unconscious process that tries to reduce the anxiety associated with instinctive desires
a country's withdrawal from international politics
a feeling of being disliked and alone
(psychiatry) a defense mechanism in which memory of an unacceptable act or impulse is separated from the emotion originally associated with it
a state of separation between persons or groups