A trash heap is a collection of waste material that has accumulated in an unorganized and unwanted manner. There are several synonyms for this word that can be used to describe this type of waste collection. One of the most common synonyms is garbage dump, which denotes a site where trash is systematically deposited. Other synonym options include landfill, rubbish pile, trash pile, and refuse heap. All these words describe the same thing, which is an unorganized mass of unwanted waste materials. Therefore, they can be used interchangeably depending on the context and the writer's specific communication needs.