/ Thesaurus / S Synonyms of stamp tax Find synonyms for: Noun1. stamp tax, stamp duty, tax, taxation, revenue enhancementusage: a tax collected by requiring a stamp to be purchased and attached (usually on documents or publications)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language