When looking for a synonym for the phrase "tenth part", there are a variety of words to consider. Some of the most common options include "decimation", "decanter", "decimal", "deccen", and "decuple". Each of these words represents a different way to describe a division into ten equal parts, and can be used depending on context and emphasis. For example, decimation is often used in reference to military tactics involving the reduction of a group by ten percent, while decanter refers to a container that is divided into ten equal parts. Whatever your need for a synonym for "tenth part", there are plenty of great choices to consider.