4
sentry(noun, case, watch, guard, lookout)
4
spotter(noun, plant, case, watch, overlook)
3
audience(noun, spectator)
3
discoverer(noun, person, search, first)
3
examiner(noun, person, search, first)
3
explorer(noun, person, search, first)
3
guard(noun, watch, keeper, lookout, custodian)
3
investigator(noun, person, plant, search, agent)
3
passerby(noun, spectator)
3
pathfinder(noun, person, search, first)
3
patrol(noun, plant, case, watch, overlook)
3
patroller
3
security guard(noun, expression, idiom, lookout)
3
spy(noun, person, plant, watch, guard)
3
surveyor(noun, person, search, first)
3
voyeur(noun, spectator)
2
seer
2
attestor(noun, witness, proof, testimony, observer)
2
clocker
2
follower
11 years ago|6.3k views|share |citing 
APASmart Define. (2015). watcher thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/watcher/thesaurus/synonyms
ChicagoSmart Define. 2015. "watcher thesaurus" https://smartdefine.org/watcher/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, watcher thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/watcher/thesaurus/synonyms>.
MLASmart Define. "watcher thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/watcher/thesaurus/synonyms>