…and found interesting:

let’s briefly define whiskey. Simply put, it is a distilled spirit made from fermented grain. Rum is distilled from fermented sugar cane, sorghum, molasses, or other sweet substances. Brandy is distilled from wine, which is made from fermented fruit. Any distillate made with anything other than grain cannot be considered whiskey. These boundaries are wide, allowing for distilled rice or quinoa to be considered whiskey, but not so wide as to be insignificant.

Bourbon is a type of whiskey, as is rye, Scotch, single malt, etc. Those all fall under the vast banner of whiskey.