The phrase "town wall" can refer to various types of boundaries constructed to fortify a town's defenses. Synonyms for this phrase can include ramparts, bulwarks, fortifications, parapets, and barricades. Ramparts are typically thicker, higher walls fortified with towers or other defensive structures. Bulwarks, on the other hand, may refer to earthworks or wooden palisades used to fortify an area. Fortifications are generic terms that encompass any form of defensive structure, including walls, moats, and towers. Parapets are low walls that provide cover for defenders, while barricades are temporary barriers erected during times of conflict. Each of these synonyms can help to convey specific nuances of meaning when discussing town walls and defensive structures more broadly.