lunacy, madness, insaneness -- (obsolete terms for legal insanity)
rabies, hydrophobia, lyssa, madness -- (an acute viral disease of the nervous system of warm-blooded animals (usually transmitted by the bite of a rabid animal); rabies is fatal if the virus reaches the brain)
fury, rage, madness -- (a feeling of intense anger; "hell hath no fury like a woman scorned"; "his face turned red with rage")
folly, foolishness, craziness, madness -- (the quality of being rash and foolish; "trying to drive through a blizzard is the height of folly"; "adjusting to an insane society is total foolishness")
madness, rabidity, rabidness -- (unrestrained excitement or enthusiasm; "poetry is a sort of divine madness")