Strong’s Greek
G3913 — paraphronia
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
παραφρονία
paraphronia — pronounced par-af-ron-ee'-ah
from 3912; insanity, i.e. foolhardiness:--madness. see GREEK for 3912
1 occurrence in the KJV.
2 Peter 2:16
But was rebuked for his iniquity: the dumb ass speaking with man’s voice forbad the madness of the prophet.