founder vs sink

founder and sink both are nouns.

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

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

Other hyponyms of founder include go off, implode, buckle, crumple, flop, break, slide down, slump.

As verbs, sink is a hypernym of founder; that is, sink is a word with a broader meaning than founder:

Other hypernyms of founder include go down, go under, settle.

founder (noun)	sink (noun)
a person who founds or establishes some institution	plumbing fixture consisting of a water basin fixed to a wall or floor and having a drainpipe
a worker who makes metal castings	a covered cistern; waste water and sewage flow into it
inflammation of the laminated tissue that attaches the hoof to the foot of a horse	a depression in the ground communicating with a subterranean passage (especially in limestone) and formed by solution or by collapse of a cavern roof
	(technology) a process that acts to absorb or remove energy or a substance from a system

founder (verb)	sink (verb)
break down, literally or metaphorically	fall heavily or suddenly; decline markedly
sink below the surface	embed deeply
stumble and nearly fall	go under
fail utterly; collapse	fall or descend to a lower place or level
	cause to sink
	fall or sink heavily
	appear to move downward
	descend into or as if into some soft substance or place
	pass into a specified state or condition; sink into