Deranged
Part of speech: adjective
Definition: disturbed or upset, especially mentally insane
Example sentence: My favorite game was one I invented with my cousins called Mean Aunt Rosie, where I was a deranged maiden aunt who chased them around the house.
Insane
Part of speech: adjective
Definition: Exhibiting unsoundness or disorder of mind; not sane; mad; deranged in mind; delirious; distracted.Used by, or appropriated to, insane persons; as, an insane hospital.Causing insanity or madness.Characterized by insanity or the utmost folly; chimerical; unpractical; as, an insane plan, attempt, etc.
Example sentence: The object of life is not to be on the side of the majority, but to escape finding oneself in the ranks of the insane.