20 entries under observer topic. ×

7
witness(noun, law, person, proof)
5
attester(noun, law, person, witness, proof)
5
attestor(noun, witness, proof, testimony)
4
spectator(noun, witness, proof, testimony)
3
deponent(noun, law, person, witness, proof)
2
bystander(noun, witness, proof, testimony)
2
eyewitness(noun, witness, proof, testimony)
2
testifier(noun, law, person, witness, proof)
2
viewer(noun, witness, proof, testimony)
1
beholder(noun, witness, proof, testimony)
1
corroborator(noun, witness, proof, testimony)
1
gawker(noun, witness, proof, testimony)
1
looker-on(noun, witness, proof, testimony)
1
onlooker(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
testimony(noun, witness, proof, watcher)
1
watcher(noun, witness, proof, testimony)
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APASmart Define. (2015). attestant thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/attestant/thesaurus/synonyms
ChicagoSmart Define. 2015. "attestant thesaurus" https://smartdefine.org/attestant/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, attestant thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/attestant/thesaurus/synonyms>.
MLASmart Define. "attestant thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/attestant/thesaurus/synonyms>