Hypernyms (cordial is a kind of...): alcohol; alcoholic beverage; inebriant; intoxicant (a liquor or brew containing alcohol as the active agent) Hyponyms (each of the following is a kind of cordial): absinth; absinthe (strong green liqueur flavored with wormwood and anise) ratafee; ratafia (sweet liqueur made from wine and brandy flavored with plum or peach or apricot kernels and bitter almonds)
Bourbon is mostly made from corn, at least 51% corn. Rye whiskey is mostly or entirely made from Rye. They differ in many other details - for example Bourbon must be aged in new, charred American Oak barrels and made in the US, Scotch must be made in Scotland, but the big differences are the grains used.
Bourbon need not be made in Kentucky, but it does need to be American-made. The distilled spirit is made from a grain mixture that must include at least 51% corn; the remainder includes rye, wheat, and/or malted barley. (In the case of Jim Beam, it's rye and malted barley. The most well-known wheated bourbon is Maker's .) When it's distilled, it has to be 160 proof or lower; when put into barrels, 125 proof or under.