A bridge-head refers to an area that is under the control of a military force on the enemy's side of a river or other natural barrier. Synonyms for this term include beachhead, foothold, outpost, stronghold, advance position, and forward position. These terms are often used interchangeably to refer to a strategic location that gives a military force a significant advantage in battle. The importance of a bridge-head cannot be overstated as it allows a military force to establish control over a key location and launch attacks on the enemy, while also providing essential protection to allies and supplies. Understanding the various synonyms for bridge-head can help in communicating effectively about military matters.