7 Old HSK word(s): ☊铁 ** B ☊铁路 ** B ☊磁铁 ** D ☊地铁 ** D ☊斩钉截铁 ** D ☊铁道 ** D ☊铁饭碗 ** D
趁热打铁* * 打铁* * 废铁* * 钢铁* * 马蹄铁* * 熟铁* * 铸铁* *

Definitions from Unihan Copyright © 1991-2015 Unicode® Inc. All rights reserved.

铸 melt, cast / coin, mint
铁 iron / strong, solid, firm

Hsk Characters: 铁 *
HSK -Characters and beyond:
GbBig5EngRadMegaTripleMultilingual
铁 94C1 + 鐵 + + iron / strong, solid, firm 金,钅 失 Gold (Metal) 失 (VERLIEREN) tie3 +

Korean:

鐵 + 铁 쇠 철 (iron, metal in general)
鐵 + 铁 쇠철(iron, metal in general)
銕 + 铁 鐵의 古字
3 NHSK word(s): 地铁* 3 di4 tie3subway/ metro 钢铁* 5 gang1 tie3steel 斩钉截铁* 6 zhan3 ding1 jie2 tie3to chop the nail and slice the iron (idiom)/ resolute and decisive/ unhesitating/ definitely/ without any doubt
KOREAN6000 word(s):
2 KOREAN 2500 New HSK words):
钢铁 + gāngtiě 강과 철. gang-gwa cheol.
地铁 + dìtiě 지하철(도를 운행하는 열차). jihacheol(doleul unhaenghaneun yeolcha).
3 KOREAN Sentence(s):
下趟地铁五分钟后来。 + 다음 기차는 오 분 후에 와요. da-eum gichaneun o bun hue wahyo.
最后一班地铁什么时候开? + 마지막 기차가 언제예요? majimag gicha-ga eonjeyeyo?
您最好是坐地铁去。 + 지하철을 타는 것이 가장 좋아요. jihacheo-reul taneun geo-shi kajang chowayo.