Synonyms to made of iron

firm, Aktiengesellschaft, CIA, Central Intelligence Agency, Christian, abiding, accepted, adamant, adamantine, agency, airtight, aktiebolag, anchored, anneal, approved, at a standstill, atelier, authentic, authoritative, balance, balanced, ballast, barbershop, beauty parlor, beauty shop, bench, body corporate, bonded, bristling, bulky, business, business establishment, butcher shop, calcify, calculable, callous, canonical, cartel, case harden, cast-iron, cemented, certain, chamber of commerce, changeless, close, close-knit, close-textured, close-woven, combine, commercial enterprise, compact, compacted, compagnie, company, compressed, concentrated, concern, concrete, condensed, congested, conglomerate, conglomerate corporation, consistent, consolidate, consolidated, consolidating company, consortium, constant, continuing, conventional, cool, copartnership, cornify, corporate body, corporation, correct, counterbalance, crammed, crammed full, crawling, crowded, customary, decided, decisive, definite, dense, dependable, desk, determine, determined, devoted, diversified corporation, dogged, dour, durable,