一六銀行[ichirokuginkou] pawnshop
一六勝負[ichirokushoubu] gambling
五臓六腑[gozouroppu] the internal organs
三十六計[sanjuurokkei] the 36 (ancient Chinese military) strategies (of which the last resort was said to be beating a retreat)
三面六臂[sanmenroppi] rush of business

四六時中[shirokujichuu] around the clock
十六[juuroku] 16
十六音符[juurokuonpu] 16th note
十六夜[izayoi] sixteen-day-old moon
上方贅六[kamigatazeiroku] people of the Kyoto area

華甲[kakou] aged 61
介甲[kaikou] crust-like shell
機甲[kikou] armour (e.g. tank)
龜甲[kikou] tortoise shell

甲乙[kouotsu] A and B
甲乙丙[kouotsuhei] ABC
甲殻[koukaku] carapace
甲殻類[koukakurui] crustacean