Words similar to insane

Example sentences for: insane

How can you use “insane” in a sentence? Here are some example sentences to help you improve your vocabulary:

His latest novel, about an insane heir to a manufacturing fortune who's forbidden to see women, is deemed diffuse and stocked with caricatures.
He might say something insightful, or boisterous, like the time he jokingly yelled, "Are you insane?"
It is also possible that my general grouchiness on the subject of the Internet has to do with the fact that I've expended a lot of energy these past few years claiming that the valuations of Internet stocks make no sense, and that, in general, what I've come to think of as the Internet stock market--people using the Internet to "learn" about Internet stocks, when they then trade via an Internet site--is insane.
I must thank David Greenberg for the fascinating "History Lesson" ("") on the postwar Jewish "Revenge Group," but I disagree that such an organized and, frankly, insane plan has much in common with the revenge killings by Albanians (we assume) of Serbs in present-day Kosovo.
Rather, as represented by NATO, the West is doing insane things, contrary to the fundamental principles of democracy."