solitariness vs lonesomeness

solitariness and lonesomeness both are nouns.

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

As nouns, solitariness and lonesomeness are synonyms defined as:

Other synonyms of solitariness include aloneness, loneliness.

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