is a specific kind of: clock time, time.

is a broader term that covers: high noon, midday, noon, noonday, noontide, twelve noon | mealtime | late-night hour | midnight | small hours | bedtime | closing time | aurora, break of day, break of the day, cockcrow, dawn, dawning, daybreak, dayspring, first light, morning, sunrise, sunup | early-morning hour | sundown, sunset | crepuscle, crepuscule, dusk, evenfall, fall, gloam, gloaming, nightfall, twilight | none | happy hour | rush hour | zero hour | canonical hour ... show more.

derivation: horary.