NASCAR

NASCAR is a proper noun referring to a specific organization and the sport it governs. In common usage, it functions as a metonym, where the name of the governing body is used to describe the racing events themselves or the specific style of stock car racing associated with the organization.

Because it is a proper noun representing a single entity, it is treated as an uncountable singular noun. It does not have a plural form in standard usage, as one does not refer to multiple "NASCARs" when discussing the sport or the association.