When it comes to writing, a pen-wiper is an essential tool to clean your pen nibs. However, there are many synonyms for this word that you can use interchangeably. Some alternatives include pen cleaner, ink blotter, ink eraser, pen sponge, pen swab, ink absorber, and pen blotter. Each of these words signifies a similar process of cleaning and wiping down a pen's nib, making it fresh and ready for use. If you're looking for a more sophisticated way to describe this tool, you could also use the term inkwell wiper, inkwell swab, or inkstand blotter, depending on the context in which the tool is being used.