grandiosity, magniloquence, grandiloquence, rhetoric

high flown style; excessive use of verbal ornamentation

• flourish — a display of ornamental speech or language
• bombast, fustian, rant, claptrap, blah — pompous or pretentious talk or writing

• expressive style, style — a way of expressing something (in language or art or music etc.) that is characteristic of a particular person or group of people or period