/ Thesaurus / S Synonyms of structural iron Find synonyms for: Noun1. structural iron, iron, Fe, atomic number 26usage: iron that has been cast or worked in structural shapesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: candid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language