Same as gossan. [PJC]

alloy cast iron, alloy iron, alpha iron, angle iron, bad hat, bar iron, basic iron, beta iron, billycock hat, bishop's hat, bowler hat, brand iron, branding iron, brass hat, bridle iron, campaign hat, cast iron, cavalier hat, church hat, climbing iron, cocked hat, corrugated iron, cowboy hat, cramp iron, curling iron, delta iron, derby hat, dress hat, driving iron, felt hat, fire iron, five iron, fur hat, gainsborough hat, galvanized iron, gamma iron, gauffering iron, goffering iron, grappling iron, grozing iron, hard hat, harping iron, hat, hat shop, hat trick, high hat, ingot iron, iron, iron age, iron blue, iron boot, iron cage, iron carbide, iron chancellor, iron collar, iron curtain, iron deficiency anaemia, iron deficiency anemia, iron disulfide, iron duke, iron filing, iron fist, iron foundry, iron gate, iron grip, iron hand, iron heel, iron horse, iron lady, iron lung, iron maiden, iron man, iron manganese tungsten, iron mold, iron mould, iron oak, iron ore, iron out, iron overload, iron oxide, iron perchloride, iron putty, iron pyrite, iron sickness, iron trap, iron tree, iron works, lofting iron, long iron, mexican hat, ni-hard iron, ni-resist iron, nine iron, old hat, one iron, opera hat, panama hat, picture hat, pig iron, pith hat, plate iron, plug hat, porkpie hat, putting iron, safety hat, scrap iron, searing iron, service hat, seven iron, sheet iron, shooting iron, short iron, shovel hat, silk hat, slouch hat, smoothing iron, soldering iron, spiegel iron, steam iron, stirrup iron, stovepipe iron, straw hat, structural iron, sun hat, swedish iron, t iron, tank iron, tee iron, ten-gallon hat, the iron gates, tin hat, tire iron, top hat, travel iron, two iron, waffle iron, woman's hat, wrought iron