desolation vs gloom

desolation and gloom both are nouns.

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

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

Other hypernyms of desolation include gloominess, glumness.

desolation (noun)	gloom (noun)
an event that results in total destruction	a feeling of melancholy apprehension
sadness resulting from being forsaken or abandoned	a state of partial or total darkness
the state of being decayed or destroyed	an atmosphere of depression and melancholy
a bleak and desolate atmosphere