THESAURUS
arrogant, assured, believing, certain, cocksure, confident, convinced, decided, determined, devout, dogmatic, doubtless, faithful, fideistic, hubristic, impressed with, overconfident, oversure, overweening, pietistic, pious, pistic, poised, pompous, positive, proud, reassured, satisfied, secure, self-assured, self-confident, self-important, self-reliant, sold on, sure, unafraid, under the impression, undoubtful, undoubting, unfaltering, unhesitating, unwavering