Filc is a Polish word that can be translated into English as "felt". However, there are other words that can be used as synonyms for this term. For example, you can use "billiard cloth" when referring to the type of felt used on pool tables. Another option is "baize", which is a type of felt that is often used for card tables. "Flannel" is another word that can be used to describe a soft, woven fabric that has a fuzzy surface. Other synonyms for filc include "textile fabric," "woolen fabric," and "plush fabric". Each of these words can be used interchangeably to describe this versatile and popular material.