renounce vs reject

renounce is not a noun while reject is a noun.

Word	Noun	Adjective	Verb	Adverb
renounce	No	No	Yes	No
reject	Yes	No	Yes	No

As verbs, reject is a hypernym of renounce; that is, reject is a word with a broader meaning than renounce:

renounce (noun)	reject (noun)
	the person or thing that is rejected or set aside as inferior in quality

renounce (verb)	reject (verb)
cast off	not accept something given or offered
turn away from; give up	dismiss from consideration or a contest
leave (a job, post, or position) voluntarily	deem wrong or inappropriate
give up, such as power, as of monarchs and emperors, or duties and obligations	reject with contempt
	not accept as true
	refuse entrance or membership
	resist immunologically the introduction of some foreign tissue or organ