ruin vs ruiner

ruin and ruiner both are nouns.

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

ruin (noun)	ruiner (noun)
destruction achieved by causing something to be wrecked or ruined	a person who destroys or ruins or lays waste to
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

ruin (verb)	ruiner (verb)
fall into ruin
destroy completely; damage irreparably
reduce to ruins
deprive of virginity
reduce to bankruptcy
destroy or cause to fail