go down vs founder

go down is not a noun while founder is a noun.

Word	Noun	Adjective	Verb	Adverb
go down	No	No	Yes	No
founder	Yes	No	Yes	No

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

Other hyponyms of go down include settle, subside, submerge, submerse.

go down (noun)	founder (noun)
	a person who founds or establishes some institution
	a worker who makes metal castings
	inflammation of the laminated tissue that attaches the hoof to the foot of a horse

go down (verb)	founder (verb)
grow smaller	break down, literally or metaphorically
stop operating	sink below the surface
be defeated	stumble and nearly fall
be ingested	fail utterly; collapse
go under
disappear beyond the horizon
move downward and lower, but not necessarily all the way
be recorded or remembered