renounce vs relinquish

renounce and relinquish both are verbs.

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

As verbs, renounce and relinquish are synonyms defined as:

Other synonyms of renounce include foreswear, quit.

renounce (verb)	relinquish (verb)
cast off	release, as from one's grip
turn away from; give up	turn away from; give up
leave (a job, post, or position) voluntarily	part with a possession or right
give up, such as power, as of monarchs and emperors, or duties and obligations	do without or cease to hold or adhere to