お下げ[osage] wearing one's hair in braids
御覧下さい[gorankudasai] please look at it
ぶら下がる[burasagaru] to hang from
ぶら下げる[burasageru] to hang
こき下ろす[kokiorosu] to denounce

案下[anka] under the table
已下[ige] not exceeding
以下の通り[ikanotoori] as below
胃下垂[ikasui] gastroptosis
一枚下[ichimaishita] one step lower

黄鉄鉱[outekkou] iron pyrites
可鍛鉄[katantetsu] malleable iron
狭軌鉄道[kyoukitetsudou] narrow-gauge railway
近鉄[kintetsu] Kinki Nippon Tetsudou (railway co.)
剣付き鉄砲[kentsukideppou] fixed bayonet

甲鉄[koutetsu] armor
甲鉄艦[koutetsukan] armored ship
甲鉄板[koutetsuban] armor plate
鋼鉄[koutetsu] steel
国鉄[kokutetsu] national railway (esp. Japan National Railways)

相鎚[aizuchi] sounds given during a conversation to indicate comprehension
鉄鎚[kanazuchi] (iron) hammer

鉄鎚を下す[tettsuiwokudasu] to crack down on (e.g. crime, corruption)