"Disordain" is a rarely used word that means to disregard, reject or disavow. It can also mean to depose or remove from a position of authority. Some synonyms for "disordain" include "deny," "refuse," "reject," "abjure," "renounce," "disclaim," "repudiate," "dethrone," "depose," "supersede," "oust," and "overthrow." These words all convey the sense of rejecting or repudiating something or someone. While "disordain" may not be a commonly used term in modern language, there are plenty of other words available to convey the same concept in a more widely understood manner.