I'm biased to the Webster Dictionary, but not prejudice against the Oxford dictionary, however I'm loyal to the version I began using early in school.
Bias
a : BENT, TENDENCY b : an inclination of temperament or outlook; especially : a personal and sometimes unreasoned judgment : PREJUDICE c : an instance of such prejudice d
Prejudice
1 : injury or damage resulting from some judgment or action of another in disregard of one's rights; especially : detriment to one's legal rights or claims
2 a (1) : preconceived judgment or opinion (2) : an adverse opinion or leaning formed without just grounds or before sufficient knowledge b : an instance of such judgment or opinion c : an irrational attitude of hostility directed against an individual, a group, a race, or their supposed characteristics
Loyalty
1 : unswerving in allegiance: as a : faithful in allegiance to one's lawful sovereign or government b : faithful to a private person to whom fidelity is due c : faithful to a cause, ideal, custom, institution, or product
So Bias is what you are after the facts, Prejudice is what you are before the facts and Loyal is what you are regardless of the facts.
