There are several synonyms for the word "mad-person" or someone who is mentally unwell. Some common synonyms are insane, crazy, lunatic, deranged, psychotic, and mentally ill. Other synonyms include unhinged, disturbed, neurotic, schizophrenic, and abnormal. While the term "mad-person" may be seen as insensitive or derogatory, using a proper synonym shows compassion and understanding towards those who may be dealing with mental health issues. It's important to be aware of the words and language used when referring to mental health, and to choose words that do not perpetuate negative stereotypes or stigma.