What is another word for "optimism"?

Roget's Thesaurus (1911) lists these synonyms for "optimism": about, ado, affiance, air, airy, all, anchor, and, anticipation, are, aspiration, assumption, assurance, attach, balm, beam, belief, best, bit, blue, bottom, box, bright, buoyancy, catch, cheer, cherry, clear, cloud, confidence, cry, dawn, day, desire, dream, end, enthusiasm, estimate, eulogize, exaggerate.