HinKhoj Dictionary

A person who has partial or complete loss of memory - Amnesiac
A person who doubts or questions accepted opinions or beliefs - Skeptic
A person or thing that causes a change or event to happen - Catalyst
A person or thing that is mysterious, puzzling, or difficult to understand - Enigma
A person new to a particular activity or field of study - Novice
A person who is blamed for the mistakes or wrongdoings of others - Scapegoat
A knowledgeable person or an expert in a particular field - Maven
A person new to a particular activity or field of study - Neophyte
A person who is seen as a source of wise and insightful advice - Oracle
A person who has knowledge or expertise in multiple fields - Polymath