Linked from
The 52 pages that link to Iron, each with the reason it gives.
BlacksmithingNarrower topic: It is the base metal named in the craft's traditional scope.
Cast iron cookwareNarrower topic: Iron is the principal metal in cast iron cookware.
Iron(II)Narrower topic: Iron(II) names one oxidation state of this element.
Iron(III) chlorideNarrower topic: Iron(III) chloride contains iron in its +3 oxidation state.
BlacksmithNarrower topic: It is the principal metal historically worked by blacksmiths.
Iron(II) hydroxideNarrower topic: Iron supplies the metal ions that form the compound.
Telluric ironNarrower topic: Telluric iron is elemental iron in a geological setting.