A scrutiniser is someone who closely examines or inspects something or someone. Synonyms for scrutiniser include investigator, examiner, inspector, evaluator, assessor, auditor, reviewer, monitor, observer, and checker. Each of these terms implies a different level or type of analysis, but they all share the characteristic of careful scrutiny or examination. An investor might investigate a company's financial records to determine its potential for growth, while an assessor would evaluate a student's performance based on predetermined criteria. Regardless of the specific context, all of these synonyms imply a careful and critical examination or assessment of something or someone.