stumble vs founder

stumble and founder both are nouns.

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

As verbs, founder is a hyponym of stumble; that is, founder is a word with a more specific, narrower meaning than stumble:

stumble (noun)	founder (noun)
an unsteady uneven gait	a person who founds or establishes some institution
an unintentional but embarrassing blunder	a worker who makes metal castings
	inflammation of the laminated tissue that attaches the hoof to the foot of a horse

stumble (verb)	founder (verb)
make an error	break down, literally or metaphorically
miss a step and fall or nearly fall	sink below the surface
walk unsteadily, tripping repeatedly	stumble and nearly fall
encounter by chance	fail utterly; collapse