| witness(noun, law, person, proof, observer) |
| attester(noun, law, person, witness, proof) |
| attestor(noun, witness, proof, testimony, observer) |
| attestator(noun, witness) |
| spectator(noun, witness, proof, testimony, observer) |
| deponent(noun, law, person, witness, proof) |
| informant |
| bystander(noun, witness, proof, testimony, observer) |
| eyewitness(noun, witness, proof, testimony, observer) |
| testifier(noun, law, person, witness, proof) |
| viewer(noun, witness, proof, testimony, observer) |
| beholder(noun, witness, proof, testimony, observer) |
| corroborator(noun, witness, proof, testimony, observer) |
| gawker(noun, witness, proof, testimony, observer) |
| informer |
| looker |
| looker-on(noun, witness, proof, testimony, observer) |
| onlooker(noun, witness, proof, testimony, observer) |
| passerby |
| proof(noun, witness, testimony, observer, watcher) |