/ Thesaurus / S Synonyms of spiegel iron Find synonyms for: Noun1. spiegeleisen, spiegel, spiegel iron, pig ironusage: pig iron containing manganese; used as a deoxidizing agent and to raise the manganese content in making steelWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: languid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language