watcher
/ˈwɒtʃə
/noun
A person who observes something attentively or regularly: [in combination]: a badger-watcher
Synonyms
onlooker, spectator, observer, viewer, looker-on, witness, eyewitness, fly on the wall, sightseer;
bystander, passer-by, non-participant;
spy
informal rubberneck
literary beholder
