renounce vs foreswear

renounce and foreswear both are verbs.

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

As verbs, renounce and foreswear are synonyms defined as:

Other synonyms of renounce include quit, relinquish.

renounce (verb)	foreswear (verb)
cast off	turn away from; give up
turn away from; give up	do without or cease to hold or adhere to
leave (a job, post, or position) voluntarily
give up, such as power, as of monarchs and emperors, or duties and obligations