twenty-four hours
- day24-hour period
- nightDark hours daily
- hoursSixty-minute spans
- clockDevice displaying time
- timeMeasured passage of moments
midnight · noon · sunrise · sunset · daily · round-the-clock · nonstop · cycle · circadian · rotation · watch · shift · marathon · sleepless · tireless · continuous · daylong · overnight
temporal duration
twenty-four hoursinstant
Briefest unit of time
moment · split second · nanosecond · millisecond · eternity