Steel Manufacture
noun, verbal noun
せいこう
成功 (せいこう) Success
製鋼 (せいこう) Steel Manufacture
性交 (せいこう、not on WK) Sexual Intercourse
鋼 (はがね) Steel
鋼鉄 (こうてつ、not on WK) Steel
鋼材 (こうざい) Steel Material
構造 (こうぞう) Structure
They say せい Koichi こう has a talent for Steel Manufacture.
Say せい something bad about Koichi こう and you'll end up with a dangerous Steel Manufacturing job.