A gun chamber is an essential component of any firearm, which holds the round of ammunition ready to be fired. There are several different synonyms for the term 'gun chamber,' each of which describes a specific type of firearm chamber. For instance, the term 'barrel' refers to the long tube-like portion of a firearm that serves as the gun chamber for most rifles. 'Magazine' often refers to a detachable chamber located beneath the gun frame that holds multiple rounds of ammunition for quick reloading. 'Chamber block' is a part of a gun that holds cartridges and bullets that can be easily loaded and fired. Overall, these synonyms help us gain a better understanding of the different types of gun chambers prevalent in various types of firearms.