The word "pile brick" can have several synonyms that can be used interchangeably. The most common synonyms for this phrase are stack, heap, and mound. These synonyms describe a collection of bricks placed on top of each other in a particular structure. Other synonyms for "pile brick" include a tower, a column, a pyramid, and a wall. These synonyms describe a particular shape and structure that can be created by piling bricks. The word "pile" also has several synonyms, such as accumulate, gather, and amass, which can be used interchangeably with "pile brick" to describe the process of building a structure using many bricks. Overall, there are many different synonyms for "pile brick," each describing a particular aspect of the structure that can be created by piling bricks.