/ Thesaurus / T Synonyms of tread wheel Find synonyms for: Noun1. treadmill, treadwheel, tread-wheel, mill, grinder, milling machineryusage: a mill that is powered by men or animals walking on a circular belt or climbing stepsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: ontiguous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language