THESAURUS
millenarian
Leibnizian, Leibnizian optimist, Pollyanna, aspirant, aspirer, bright, cheerful, chiliast, chiliastic, couleur de rose, hopeful, hoper, irrepressible optimist, millennialist, millennialistic, millennian, optimist, optimistic, perfectibilist, perfectibilitarian, perfectionist, philosophical optimist, ray of sunshine, rose-colored, roseate, rosy, sunny, upbeat, utopian