Synonyms for Highfalutin (same or very similar meaning)
WordNet sense 1 (affectedly genteel):
grandiose, hoity-toity, la-di-da, hifalutin, highfalutingWordNet sense 2 (making claim to or creating an appearance of (often undeserved) importance or distinction):
pretentiousFrom the ODE community, based on WordNetadd/edit