desolation vs ruin

desolation and ruin both are nouns.

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

As nouns, ruin is a hypernym of desolation; that is, ruin is a word with a broader meaning than desolation:

Other hypernyms of desolation include ruination.

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

Other hyponyms of desolation include ruination, blight.

desolation (noun)	ruin (noun)
an event that results in total destruction	destruction achieved by causing something to be wrecked or ruined
sadness resulting from being forsaken or abandoned	a ruined building
the state of being decayed or destroyed	an event that results in destruction
a bleak and desolate atmosphere	failure that results in a loss of position or reputation
	the process of becoming dilapidated
	an irrecoverable state of devastation and destruction

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