Synonyms for Overblown (same or very similar meaning)
WordNet sense 1 (puffed up with vanity):
grandiloquent, pompous, pontifical, portentousWordNet sense 2 (making claim to or creating an appearance of (often undeserved) importance or distinction):
pretentiousWordNet sense 3 (having reached full natural growth or development):
matureFrom the ODE community, based on WordNetadd/edit