witness Synonyms

certify see find registrar testamur testifier testifying testify testimonial testimony undergo undersign validate validation view testament swearer substantiation saw seen seeing seel show sign signatory signer spectator spectatress spectatrix spot subscribe viewer vouch best man gawker onlooker rubberneck rubbernecker material witness mercy seat nonparticipant passerby sightseer spectate voyeuristic witnesses look on jury box attestator voucher