1. vanity Egoism is giving the "I" undue supremacy in thought; egotism is giving the "I" undue prominence in speech. Egotism is sometimes used in the sense of egoism, or supreme regard for oneself. Se Synonyms: egotism, conceit, self-assertion, self-confidence, self-esteem, egoism, self-conceit, self-consciousness, vanity Antonyms: bashfulness, humility, self-forgetfulness, unobtrusiveness, deference, modesty, shyness, unostentatiousness, diffidence, self-distrust