The word "preconceptioned" refers to an idea or belief that someone holds before encountering evidence or information. Synonyms for this word include "prejudiced," "biased," "narrow-minded," "closed-minded," "predisposed," "prepossessed," "prejudgmental," "prejudiced," "preoccupied," "presumptuous," and "prejudicial." These words all describe a mentality of having made up one's mind before all evidence or information has been considered. They can indicate a lack of openness to new ideas or perspectives and can lead to unfair treatment of individuals or groups. It is important to approach new situations with an open mind and consider all available information before making judgments or reaching conclusions.