sesquipedalian -
given to the overuse of long words; "sesquipedalian orators"; "this sesquipedalian way of saying one has no money"
pretentious making claim to or creating an appearance of (often undeserved) importance or distinction; "a pretentious country house"; "a pretentious fraud"; "a pretentious scholarly edition"
sesquipedalian -
(of words) long and ponderous; having many syllables; "sesquipedalian technical terms"