ruination vs demolition

ruination and demolition both are nouns.

Word	Noun	Adjective	Verb	Adverb
ruination	Yes	No	No	No
demolition	Yes	No	No	No

As nouns, demolition is a hypernym of ruination; that is, demolition is a word with a broader meaning than ruination:

Other hypernyms of ruination include destruction, wipeout.

ruination (noun)	demolition (noun)
destruction achieved by causing something to be wrecked or ruined	the act of demolishing
an event that results in destruction	an event that completely destroys something
failure that results in a loss of position or reputation
an irrecoverable state of devastation and destruction