Synonyms for High-flown (same or very similar meaning)
WordNet sense 1 (pretentious (especially with regard to language or ideals)):
high-sounding
WordNet sense 2 (making claim to or creating an appearance of (often undeserved) importance or distinction):
pretentious
WordNet sense 3 (of high moral or intellectual value; elevated in nature or style):
high-minded
WordNet sense 4 (having or showing or indicative of high or elevated character):
noble
From the ODE community, based on WordNet
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