Breadcrumb Home > Thesaurus > T Synonyms of tach Find synonyms for: Noun1. tachometer, tach, measuring instrument, measuring system, measuring deviceusage: measuring instrument for indicating speed of rotationWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of tach (Dictionary) ✖ Related Content Daily Word Quiz: hortatory Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language