A "plug hat" is a type of men's hat characterized by a low, cylindrical crown and a wide brim. It was a popular fashion accessory in the 19th and early 20th centuries. However, there are some synonyms for the word "plug hat" that can be used interchangeably. One of the alternatives is "top hat" or "beaver hat," which is a tall, cylindrical hat with a narrow brim. Another common synonym used for the plug hat is "stovepipe hat," which has a similar shape to the top hat but is even taller and slimmer. Other less common alternatives include "high hat," "silk hat," or "chimney pot hat."".