forlornness vs desolation

forlornness and desolation both are nouns.

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

As nouns, forlornness and desolation are synonyms defined as:

forlornness and desolation: sadness resulting from being forsaken or abandoned

Other synonyms of forlornness include loneliness.

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