Thesaurus.com
Dictionary.com
Definitions

hourglass

[ouuhr-glas, -glahs, ou-er-] / ˈaʊərˌglæs, -ˌglɑs, ˈaʊ ər- /
NOUN
chronometer
Synonyms
STRONG
clock metronome timepiece timer
NOUN
clock
Synonyms
STRONGEST
timer
STRONG
alarm chronograph chronometer metronome pendulum stopwatch sundial ticker timekeeper timepiece watch
WEAK
Big Ben chroniker digital watch tick-tock timemarker
NOUN
timepiece
Synonyms
STRONG
calendar chronograph chronometer chronoscope clepsydra clock dial gnomon horologe metronome pendulum repeater stopwatch sundial watch
WEAK
alarm clock isochronon time-keeper

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.