/ Thesaurus / P Synonyms of phrontistery Find synonyms for: Noun1. phrontistery, establishmentusage: an establishment for study and learning (sometimes including modern universities)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language