Synonyms of big-talking

2 Syllables
turgid, wordy, high-flown, ranting, windy, tumid, fustian, windbag, swollen
3 Syllables
euphuistic, loudmouthed, balderdash, flowery, rhapsodic, verbose, sonorous, inflated, bombastic, histrionic, grandiose, overblown, aureate, orotund
4 Syllables
highfalutin, ostentatious, magniloquent, grandiloquent, rhetorical
5 Syllables
declamatory