Racism is the belief that race is the primary determinant of human traits and capacities and that racial differences produce an inherent superiority of a particular race
A bigot is a person who is obstinately and irrationally, often intolerantly, devoted to his or her own religion, political party, organization, belief, or opinion, especially one who regards or treats those of differing devotion with hatred and intolerance
A prejudice is a preconceived belief, opinion or judgment especially toward a group of people characterized by their race, social class, gender, ethnicity, sexual orientation, age or religion. Also, it means a priori beliefs (without knowledge of the facts) and includes "any unreasonable attitude that is unusually resistant to rational influence."[1] Although positive and negative prejudice both exist, when used negatively, "prejudice" implies fear and antipathy toward such a group.