noun
tester, questioner, inquisitor, inquirer, district attorney, inspector, prosecutor, observer, investigator, quizmaster, scrutinizer, interrogator, explorer, assayer, appraiser, analyst, surveyor, catechist, censor, critic, researcher, prober, auditor, reviewer, accountant, interlocutor, doctor, teacher, proctor, psychoanalyst, D.A.*, quizzer*; see also checker.
