ruiner vs diversionist

ruiner and diversionist both are nouns.

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

As nouns, diversionist is a hyponym of ruiner; that is, diversionist is a word with a more specific, narrower meaning than ruiner:

Other hyponyms of ruiner include annihilator, iconoclast, image breaker, saboteur, wrecker, vandal.

ruiner (noun)	diversionist (noun)
a person who destroys or ruins or lays waste to	someone who commits sabotage or deliberately causes wrecks