The Clue Word's neighbour, often
The Answer EXCEL
The answer "EXCEL" fits the clue "Word's neighbour, often" because it refers to the program Microsoft Excel, which is commonly used alongside Microsoft Word. In many workplaces, people use both programs for different tasks, making them neighbors in the software suite. Additionally, "excel" means to perform exceptionally well, which can relate to how one might use Word and Excel effectively together. Thus, the connection between the two programs makes "EXCEL" a fitting answer.