一刻[ikkoku] minute
一刻も早く[ikkokumohayaku] immediately
一刻千金[ikkokusenkin] every moment is precious
印刻[inkoku] seal engraving

印刻師[inkokushi] seal engraver
夏時刻[natsujikoku] daylight-saving time
午刻[gokoku] noon
行動発起時刻[koudouhakkijikoku] h-hour

辰年[tatsudoshi] year of the dragon
北辰[hokushin] North-Star
辰巳[tatsumi] southeast
佳辰[kashin] lucky day
星辰[seishin] celestial bodies

辰の刻[tatsunokoku] 8 am
辰の年[tatsunotoshi] the year of the Dragon
誕辰[tanshin] birthday
戊辰[boshin] fifth of the sexagenary cycle