- grandiloquent, magniloquent, tall - lofty in style; "he engages in so much tall talk, one never really realizes what he is saying"
Antonym: unrhetorical (indirect, via rhetorical)
- grandiloquent, overblown, pompous, pontifical, portentous - puffed up with vanity; "a grandiloquent and boastful manner"; "overblown oratory"; "a pompous speech"; "pseudo-scientific gobbledygook and pontifical hooey"- Newsweek
Antonym: unpretentious (indirect, via pretentious)