Found 2 items, similar to blitheness.
English → English (WordNet) Definition: blitheness blitheness n : a feeling of spontaneous good spirits; “his cheerfulness made everyone feel better” [syn: cheerfulness] [ant: cheerlessness]
English → English (gcide) Definition: Blitheness Blitheness \Blithe"ness\, n. The state of being blithe. --Chaucer. [1913 Webster]