/ Thesaurus / L Synonyms of lead free Find synonyms for: Adjective1. lead-free, nonleaded, unleaded (vs. leaded), leadlessusage: (of gasoline) not containing tetraethyl lead; "lead-free gasoline"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: beseech Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language