LONELINESS
aloneness, loneliness, lonesomeness, solitariness
(noun) a disposition toward being alone
forlornness, loneliness, desolation
(noun) sadness resulting from being forsaken or abandoned
loneliness, solitariness
(noun) the state of being alone in solitary isolation
Source: WordNet® 3.1
Etymology
Noun
loneliness (countable and uncountable, plural lonelinesses)
A feeling of depression resulting from being alone or from having no companions.
The condition or state of being alone or having no companions.
The state of being unfrequented or devoid of human activity (of a place or time).
(obsolete) A desire to be alone; disposition to solitude.
Synonyms
• (depression resulting from being alone): lonesomeness
• (condition of being alone): aloneness, friendlessness, seclusion, solitariness, solitude
Source: Wiktionary
Lone"li*ness, n.
1. The condition of being lonely; solitude; seclusion.
2. The state of being unfrequented by human beings; as, the
loneliness of a road.
3. Love of retirement; disposition to solitude.
I see The mystery of your loneliness. Shak.
4. A feeling of depression resulting from being alone.
Syn.
– Solitude; seclusion. See Solitude.
Source: Webster’s Unabridged Dictionary 1913 Edition