3
neighbour
3
passer-by
3
testifier(noun, witness, proof, testimony, observer)
2
audience(noun, spectator)
2
attestant(noun, witness, proof, testimony, observer)
2
attestor(noun, witness, proof, testimony, observer)
2
deponent(noun, witness, proof, testimony, observer)
2
looker on(verb, expression, phrasal verb)
2
observe
1
informant
1
TV viewer(noun, slouch, laggard, drone)
1
abutter
1
adjoiner
1
attestator
1
attester
1
bird-watcher
1
bystanders
1
cojuror
1
compurgator
1
corroborator(noun, witness, proof, testimony, observer)
10 years ago|10k views|share |citing 
APASmart Define. (2016). bystander thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/bystander/thesaurus/synonyms
ChicagoSmart Define. 2016. "bystander thesaurus" https://smartdefine.org/bystander/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, bystander thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/bystander/thesaurus/synonyms>.
MLASmart Define. "bystander thesaurus" 26 February 2016. Web. 24 September 2026. <https://smartdefine.org/bystander/thesaurus/synonyms>