Evaluator and Ombudsman

Evaluator noun - An authority who is able to estimate worth or quality.

Ombudsman and evaluator are semantically related in person who arbitrates topic. In some cases you can use "Ombudsman" instead a noun "Evaluator".

Ombudsman noun - A government appointee who investigates complaints by private persons against the government.

Evaluator and ombudsman are semantically related in person who arbitrates topic. You can use "Evaluator" instead a noun "Ombudsman".