| term | pronunciation | English |
|---|
| 鉄 | てつ | iron |
| 私鉄 | してつ | private train company |
| 鉄橋 | てっきょう | steel bridge |
| 地下鉄 | ちかてつ | the subway, the underground, the Tube (Metro) |
| 可鍛鉄 | かたんてつ | malleable iron |
| 国鉄 | こくてつ | national railway |
| 狭軌鉄道 | きょうきてつどう | narrow-gauge railway |
| 製鉄所 | せいてつじょ, せいてつしょ | ironworks, steelworks |
| 近鉄 | きんてつ | Kinki Nippon Tetsudou (railway co.) |
| 鉄則 | てっそく | ironclad regulation, inviolable rule |
| 鉄塔 | てっとう | pylon, steel tower |
| 鉄扉 | てっぴ | iron door |
| 鉄条網 | てつじょうもう | (barbed) wire entanglements |
| 鉄板 | てっぱん | iron plate; sure thing |
| 鉄棒 | てつぼう, かなぼう | iron rod, crowbar, horizontal bar (gymnastics) |
| 鉄砲 | てっぽう | gun; wooden pole that sumo wrestlers strike in practice (practise); fugu |
| 鉄筋 | てっきん | rebar, (concrete) iron reinforcing bar |
| 鉄腕 | てつわん | strong arm |
| 鉄道 | てつどう | railroad |
| 鉄鉱 | てっこう | iron ore |
| 鉄鋼 | てっこう | iron and steel |
| 鉄骨 | てっこつ | steel frame |
| 銑鉄 | せんてつ, ずくてつ | pig iron |
| 鋳鉄 | ちゅうてつ | cast iron |
| 鋼鉄 | こうてつ | steel |
| 電鉄 | でんてつ | electric railway |
| 非鉄金属 | ひてつきんぞく | nonferrous metals |