19 entries under observer topic. ×

17
witness(noun, person, fan, spectator)
17
spectator(noun, person, see, awareness, witness)
17
bystander(noun, person, see, awareness, witness)
15
eyewitness(noun, person, witness, fan)
15
looker-on(noun, person, see, awareness, witness)
15
watcher(noun, person, see, awareness, witness)
13
beholder(noun, person, see, awareness, witness)
13
viewer(noun, person, witness, fan, testimony)
1
attestant(noun, witness, proof, testimony)
1
attestor(noun, witness, proof, testimony)
1
corroborator(noun, witness, proof, testimony)
1
deponent(noun, witness, proof, testimony)
1
gawker(noun, witness, proof, testimony)
1
proof(noun, witness, testimony, watcher)
1
rubbernecker(noun, witness, proof, testimony)
1
signatory(noun, witness, proof, testimony)
1
signer(noun, witness, proof, testimony)
1
testifier(noun, witness, proof, testimony)
1
testimony(noun, witness, proof, watcher)
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APASmart Define. (2016). onlooker thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/onlooker/thesaurus/synonyms
ChicagoSmart Define. 2016. "onlooker thesaurus" https://smartdefine.org/onlooker/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, onlooker thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/onlooker/thesaurus/synonyms>.
MLASmart Define. "onlooker thesaurus" 26 February 2016. Web. 25 September 2026. <https://smartdefine.org/onlooker/thesaurus/synonyms>