renege vs mistake

renege and mistake both are nouns.

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

As nouns, mistake is a hypernym of renege; that is, mistake is a word with a broader meaning than renege:

renege: the mistake of not following suit when able to do so
mistake: a wrong action attributable to bad judgment or ignorance or inattention

Other hypernyms of renege include error, fault.

renege (noun)	mistake (noun)
the mistake of not following suit when able to do so	a wrong action attributable to bad judgment or ignorance or inattention
	an understanding of something that is not correct
	part of a statement that is not correct

renege (verb)	mistake (verb)
fail to fulfill a promise or obligation	to make a mistake or be incorrect
	identify incorrectly