stumble vs mistake

stumble and mistake both are nouns.

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

As verbs, mistake is a hypernym of stumble; that is, mistake is a word with a broader meaning than stumble:

Other hypernyms of stumble include err, slip.

stumble (noun)	mistake (noun)
an unsteady uneven gait	a wrong action attributable to bad judgment or ignorance or inattention
an unintentional but embarrassing blunder	an understanding of something that is not correct
	part of a statement that is not correct

stumble (verb)	mistake (verb)
make an error	to make a mistake or be incorrect
miss a step and fall or nearly fall	identify incorrectly
walk unsteadily, tripping repeatedly
encounter by chance