Delirium is a state of mental confusion that is often accompanied by hallucinations, disorientation, and agitation. There are several synonyms that can be used to describe this condition, which include frenzy, madness, hysteria, and mania. These words all convey the idea of an extreme mental state that is characterized by a loss of control and a break from reality. Other synonyms for delirium might include confusion, bewilderment, or disorientation, as these words also suggest a sense of mental or emotional turmoil. Despite the different connotations of each word, all of these synonyms can be used to describe the same basic phenomenon of a heightened and abnormal mental state.