/ Thesaurus / G Synonyms of grammatical rule Find synonyms for: Noun1. grammatical rule, rule of grammar, rule, linguistic ruleusage: a linguistic rule for the syntax of grammatical utterancesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language