A holier-than-thou type is someone who believes they are morally superior to others and often looks down on them. The two crossword solutions for this term are 'PRIG' (4 letters) and 'MORALIST' (8 letters). A PRIG is someone who is excessively concerned with propriety or correctness, often in an annoying way. A MORALIST is someone who is strongly concerned with right and wrong behavior and often expresses their opinion on the matter.