Synonyms of onlooker

onlooker

noun

ˈȯn-ˌlu̇-kər 

as in observer

someone who sees or watches something

several onlookers gave chase after the thief grabbed the woman's purse

Synonyms & Similar Words

• observer
• spectator
• viewer
• witness
• bystander
• watcher
• eyewitness
• spy
• voyeur
• peeper

Example Sentences

Recent Examples of onlooker

The organization is holding its annual summer meeting, and onlookers are calling for the head of its leader, Ken Martin. — James Dinneen, New Yorker, 13 Aug. 2026

Wrapped in a blue blanket, the young woman was carried to a waiting ambulance as firefighters embraced and onlookers erupted in cheers. — Astrid Suarez, Los Angeles Times, 12 Aug. 2026

As the moon slid into place over the sun, onlookers may have seen Baily’s beads—flashes of sunlight shining through valleys along the moon’s rugged limb. — Claire Cameron & Lee Billings, Scientific American, 12 Aug. 2026

The video shows the building shaking and crumbling as onlookers scream before the structure ultimately gives way. — Eric MacK , Sophia Compton, FOXNews.com, 10 Aug. 2026