/ Thesaurus / S Synonyms of sparkplug wrench Find synonyms for: Noun1. sparkplug wrench, wrench, spannerusage: a wrench for removing or tightening spark plugs into the cylinder head of an internal combustion engineWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: illegible Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language