Search Result for "loneliness": 
Wordnet 3.0

NOUN (3)

1. the state of being alone in solitary isolation;
[syn: loneliness, solitariness]

2. sadness resulting from being forsaken or abandoned;
[syn: forlornness, loneliness, desolation]

3. a disposition toward being alone;
[syn: aloneness, loneliness, lonesomeness, solitariness]


The Collaborative International Dictionary of English v.0.48:

Loneliness \Lone"li*ness\, n. 1. The condition of being lonely; solitude; seclusion. [1913 Webster] 2. The state of being unfrequented by human beings; as, the loneliness of a road. [1913 Webster] 3. Love of retirement; disposition to solitude. [1913 Webster] I see The mystery of your loneliness. --Shak. [1913 Webster] 4. A feeling of depression resulting from being alone. [1913 Webster] Syn: Solitude; seclusion. See Solitude. [1913 Webster]
WordNet (r) 3.0 (2006):

loneliness n 1: the state of being alone in solitary isolation [syn: loneliness, solitariness] 2: sadness resulting from being forsaken or abandoned [syn: forlornness, loneliness, desolation] 3: a disposition toward being alone [syn: aloneness, loneliness, lonesomeness, solitariness]
Moby Thesaurus II by Grady Ward, 1.0:

20 Moby Thesaurus words for "loneliness": alienation, aloneness, aloofness, celibacy, detachment, isolation, keeping apart, loneness, lonesomeness, moving apart, privacy, seclusion, separateness, sequestration, single blessedness, singleness, solitariness, solitude, splendid isolation, withdrawal