Document , bystander, evidence, attend, certificate, and countersign are synonyms for witness; ignore and disregard are antonyms of witness. On this page, you will find 34 another word for witness.
1. onlooker
2. proof
3. observe
4. endorse
I will witness the event tomorrow.
She was a witness to history.
He hoped to witness the sunrise.
They called a witness to testify.