It's always great to have a variety of options when it comes to things like hot dog buns. One popular synonym for hot dog bun is the classic "hot dog roll." Another option you might want to consider is the "New England-style bun," which is more of a rectangular shape and typically buttered and grilled. Other regional variations include the "Chicago-style poppy seed bun" and the "New York-style bagel dog." If you're looking for a healthier option, you might opt for a "lettuce wrap" or "whole wheat bun." Whatever your preference, there's sure to be a hot dog bun synonym out there to suit your tastes.