/ Thesaurus / I Synonyms of inner tube Find synonyms for: Noun1. inner tube, tube, tubingusage: an inflatable rubber tube that fits inside the casing of a pneumatic tireWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language