Synonyms of timekeeper

1 Syllable
watch, dial, clock
2 Syllables
gnomon, sundial, tick-tock, stopwatch, hourglass
3 Syllables
calendar, clepsydra, chronograph, repeater, chroniker, pendulum, time-keeper
4 Syllables
horologe, timemarker, chronometer, metronome, chronoscope, isochronon