/ Thesaurus / I Synonyms of inland revenue Find synonyms for: Noun1. Inland Revenue, IR, administrative unit, administrative bodyusage: a board of the British government that administers and collects major direct taxesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language