is a specific kind of: amount, measure, quantity.

is a broader term that covers: distance | deadline | arrival time, time of arrival | departure time, time of departure | midterm | full term, term | midterm | instant, minute, moment, second | run-time | beginning, commencement, first, get-go, kickoff, offset, outset, showtime, start, starting time | middle | end, ending | phase, phase angle | show time | then ... show more.