Four-pounder is a term commonly used to describe a cannon with a caliber of four pounds. However, there are other synonyms for this term that may be useful to know. Some of these include the four-pound cannon, the four-pound gun, and the four-pound artillery. In addition, other related terms may include terms like culverin or saker, which describe similarly-sized cannons. Overall, understanding synonyms for four-pounder can be useful for those studying history or military tactics, or for those who simply want to expand their vocabulary and knowledge of specialized language.