(metallurgy) galvanized iron

roof

zinc, Zn

(archaic) iron / (figuratively) something extremely strong

iron

iron, the metal and the metallic chemical element / (more generally) steel / short for 鉄砲 (teppō, literally “cannon”, but in this case, refers to the poisonous fugu blowfish or dishes made from it)

(mineralogy) rosasite

(weaponry) a caltrop

crowbar

(shogi) iron general (a piece used in dai shogi and larger shogi variants)