The word "pleater" refers to a tool or a person who creates pleats. However, there are several synonyms that can be used to refer to this word. Some of these synonyms include "pleat maker," "pleat former," "pleat designer," "pleat creator," and "pleat fabricator." Additionally, other words that can be used to refer to this concept include "ruffler," "gatherer," "smocker," and "ruching specialist." Regardless of the specific term used, all of these words refer to an individual who is skilled in the process of creating pleats or other similar design features in fabrics.