displacement vs rejection

displacement and rejection both are nouns.

Word	Noun	Adjective	Verb	Adverb
displacement	Yes	No	No	No
rejection	Yes	No	No	No

As nouns, rejection is a hypernym of displacement; that is, rejection is a word with a broader meaning than displacement:

displacement (noun)	rejection (noun)
act of taking the place of another especially using underhanded tactics	the act of rejecting something
act of removing from office or employment	the speech act of rejecting
the act of uniform movement	(medicine) an immunological response that refuses to accept substances or organisms that are recognized as foreign
to move something from its natural environment	the state of being rejected
an event in which something is displaced without rotation
(psychiatry) a defense mechanism that transfers affect or reaction from the original object to some more acceptable one
(chemistry) a reaction in which an elementary substance displaces and sets free a constituent element from a compound