Slitter is a machine that is used for cutting or trimming material to specific sizes. Some synonyms for the word slitter include cutter, trimmer, slicer, splitter, divider, and perforator. A cutter is a tool or machine used for cutting something into smaller pieces. A trimmer is a tool used for removing or cutting the edges of something. A slicer is a tool used for cutting food or other materials into thin and uniform pieces. A splitter is a tool or machine that is used for dividing or separating something into smaller parts. A perforator is a tool used for creating holes in a material. All of these synonyms can be used interchangeably with the word slitter depending on the context.