impoverish vs ruin

impoverish is not a noun while ruin is a noun.

Word	Noun	Adjective	Verb	Adverb
impoverish	No	No	Yes	No
ruin	Yes	No	Yes	No

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

Other hyponyms of impoverish include reduce, beggar, pauperise, pauperize, bankrupt, break, smash.

impoverish (noun)	ruin (noun)
	destruction achieved by causing something to be wrecked or ruined
	a ruined building
	an event that results in destruction
	failure that results in a loss of position or reputation
	the process of becoming dilapidated
	an irrecoverable state of devastation and destruction

impoverish (verb)	ruin (verb)
take away	fall into ruin
make poor	destroy completely; damage irreparably
	reduce to ruins
	deprive of virginity
	reduce to bankruptcy
	destroy or cause to fail