Synonyms of watcher

1 Syllable
spy, spies, voyeurs, guard, voyeur
2 Syllables
watchman, gazer, oglers, spotter, gawkers, spotters, viewers, witness, standee, sentry, clapper, flagger, flagman, watchmen, lookout, viewer, gazers, gawker, shepherd, clappers, keeper, ogler
3 Syllables
witnesses, stander-by, observer, observers, signaller, shepherdess, onlooker, beholders, attestant, looker-on, testifier, bystanders, onlookers, spectators, beholder, passer-by, watchperson, bystander, signalmen, watchkeeper, perceiver, watchwoman, eyewitness, spectator, testifiers, signalman, sentinel, perceivers
4 Syllables
pastoralist, rubbernecker, eyewitnesses, belvedere
5 Syllables
corroborator, corroborators, intelligencer