proscription vs rejection

proscription and rejection both are nouns.

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

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

proscription: rejection by means of an act of banishing or proscribing someone
rejection: the act of rejecting something

proscription (noun)	rejection (noun)
rejection by means of an act of banishing or proscribing someone	the act of rejecting something
a decree that prohibits something	the speech act of rejecting
	(medicine) an immunological response that refuses to accept substances or organisms that are recognized as foreign
	the state of being rejected