Certifiable
Part of speech: adjective
Definition: That can, or that must be certified. Mentally ill to such an extent that involuntary institutionalization is appropriate; crazy.
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 world we see that seems so insane is the result of a belief system that is not working. To perceive the world differently, we must be willing to change our belief system, let the past slip away, expand our sense of now, and dissolve the fear in our minds.