Liters is a commonly used unit of volume measurement. However, there are several synonyms that can be used interchangeably with the word litres. Some of the common synonyms include litre, liter, ltr, and L. These are all abbreviations of the word liters. In addition, some people may also use terms like cubic decimeter or deciliter to refer to a volume of one litre. These units of measurement are typically used in scientific or medical contexts. Regardless of the term used, it is important to always clarify the units of measurement being used to ensure accurate understanding and communication.