/ Thesaurus / P Synonyms of potash alum Find synonyms for: Noun1. alum, potassium alum, potash alum, aluminum, aluminium, Al, atomic number 13, double saltusage: a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminumWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language