projection vs defence mechanism

projection and defence mechanism both are nouns.

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

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

projection: (psychiatry) a defense mechanism by which your own traits and emotions are attributed to someone else
defence mechanism: (psychiatry) an unconscious process that tries to reduce the anxiety associated with instinctive desires

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

projection (noun)	defence mechanism (noun)
the act of expelling or projecting or ejecting	(psychiatry) an unconscious process that tries to reduce the anxiety associated with instinctive desires
the act of projecting out from something
any structure that branches out from a central support
the representation of a figure or solid on a plane as it would look from a particular direction
a planned undertaking
a prediction made by extrapolating from past observations
the projection of an image from a film onto a screen
the acoustic phenomenon that gives sound a penetrating quality
(psychiatry) a defense mechanism by which your own traits and emotions are attributed to someone else
any solid convex shape that juts out from something