devastate vs desolate

devastate is not an adjective while desolate is an adjective.

Word	Noun	Adjective	Verb	Adverb
devastate	No	No	Yes	No
desolate	No	Yes	Yes	No

As verbs, devastate and desolate are synonyms defined as:

Other synonyms of devastate include lay waste to, ravage, scourge, waste.

devastate (adjective)	desolate (adjective)
	crushed by grief
	providing no shelter or sustenance

devastate (verb)	desolate (verb)
cause extensive destruction or ruin utterly	reduce in population
overwhelm or overpower	cause extensive destruction or ruin utterly
	leave someone who needs or counts on you; leave in the lurch