Lunatic noun – A person judged to be legally or medically insane. Nut case and lunatic are semantically related In some cases you can use "Nut case" instead a noun "Lunatic". Nearby Words: lunacy, luna
Nut case noun – A whimsically eccentric person. Lunatic and nut case are semantically related in crackpot topic. You can use "Lunatic" instead a noun phrase "Nut case", if it concerns topics such as insane person.