cocksure
131opinionated — Synonyms and related words: antiblack, balking, balky, biased, bigoted, bulldogged, bulletheaded, bullheaded, case hardened, chauvinistic, cocksure, colored, conceited, dictatorial, doctrinaire, doctrinarian, dogged, dogmatic, dogmatizing,… …
132overconfident — Synonyms and related words: arrogant, assured, audacious, brash, brazen, brazenfaced, cocksure, cocky, confident, convinced, decided, determined, foolhardy, hasty, heedless, hubristic, improvident, imprudent, impudent, incautious, indiscreet,… …