loneliness vs desolation

loneliness and desolation both are nouns.

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

As nouns, loneliness and desolation are synonyms defined as:

loneliness and desolation: sadness resulting from being forsaken or abandoned

Other synonyms of loneliness include forlornness.

loneliness (noun)	desolation (noun)
a disposition toward being alone	an event that results in total destruction
sadness resulting from being forsaken or abandoned	sadness resulting from being forsaken or abandoned
the state of being alone in solitary isolation	the state of being decayed or destroyed
	a bleak and desolate atmosphere