lonesomeness vs solitariness

lonesomeness and solitariness both are nouns.

Word	Noun	Adjective	Verb	Adverb
lonesomeness	Yes	No	No	No
solitariness	Yes	No	No	No

As nouns, lonesomeness and solitariness are synonyms defined as:

Other synonyms of lonesomeness include aloneness, loneliness.

lonesomeness (noun)	solitariness (noun)
a disposition toward being alone	a disposition toward being alone
	the state of being alone in solitary isolation