renege vs overturn

renege and overturn both are nouns.

Word	Noun	Adjective	Verb	Adverb
renege	Yes	No	Yes	No
overturn	Yes	No	Yes	No

As verbs, overturn is a hypernym of renege; that is, overturn is a word with a broader meaning than renege:

Other hypernyms of renege include annul, countermand, lift, repeal, rescind, reverse, revoke, vacate.

renege (noun)	overturn (noun)
the mistake of not following suit when able to do so	the act of upsetting something
	an improbable and unexpected victory

renege (verb)	overturn (verb)
fail to fulfill a promise or obligation	change radically
	rule against
	cancel officially
	turn from an upright or normal position
	cause to overturn from an upright or normal position
	cause the downfall of; of rulers