/ Thesaurus / I Synonyms of inertial guidance system Find synonyms for: Noun1. inertial guidance system, inertial navigation system, systemusage: a system to control a plane or spacecraft; uses inertial forcesWordNet 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