"Porkpie" is a type of hat that has a flat top and a narrow, curled brim. There are several synonyms for "porkpie" that can be used to describe this particular style of hat. Some of the most common synonyms include "porkpie hat", "porkpie cap", and "pork pie". Other synonyms that might be used to describe this type of hat include "fedora", "trilby", and "newsboy cap". While all of these terms refer to a similar style of headwear, each one has its own unique characteristics and features that set it apart from the others. Ultimately, the choice of which term to use will depend on the particular style and design of the hat in question.