aloneness vs loneliness

aloneness and loneliness both are nouns.

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

As nouns, aloneness and loneliness are synonyms defined as:

Other synonyms of aloneness include lonesomeness, solitariness.

aloneness (noun)	loneliness (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