Synonyms of watchkeeper

1 Syllable
spy, watch, guard, ward, scout
2 Syllables
ranger, patrol, spotter, wardens, picket, warden, sentry, flagger, watcher, lookout, keeper
3 Syllables
observer, signaller, curator, dogcatcher, custodian, sentinel
4 Syllables
caretaker, gamekeeper, detective, gamekeepers