renunciation vs rejection

renunciation and rejection both are nouns.

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

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

renunciation: the act of renouncing; sacrificing or giving up or surrendering (a possession or right or title or privilege etc.)
rejection: the act of rejecting something

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

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

renunciation: the state of having rejected your religious beliefs for your political party or a cause (often in favor of opposing beliefs or causes)
rejection: the state of being rejected

renunciation (noun)	rejection (noun)
the act of renouncing; sacrificing or giving up or surrendering (a possession or right or title or privilege etc.)	the act of rejecting something
an act (spoken or written) declaring that something is surrendered or disowned	the speech act of rejecting
rejecting or disowning or disclaiming as invalid	(medicine) an immunological response that refuses to accept substances or organisms that are recognized as foreign
the state of having rejected your religious beliefs for your political party or a cause (often in favor of opposing beliefs or causes)	the state of being rejected