loneliness vs lonesomeness

loneliness and lonesomeness both are nouns.

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

As nouns, loneliness and lonesomeness are synonyms defined as:

Other synonyms of loneliness include aloneness, solitariness.

loneliness (noun)	lonesomeness (noun)
a disposition toward being alone	a disposition toward being alone
sadness resulting from being forsaken or abandoned
the state of being alone in solitary isolation