Synonyms of onlooker in English:

onlooker


See definition of onlooker

noun

1‘an onlooker described the scene as one of utter devastation’

SYNONYMS
eyewitness, witness, observer, looker-on, fly on the wall, spectator, watcher, viewer, sightseer, bystander, non-participant
informal rubberneck
literary beholder
ANTONYMS

participant