The word "chunker" refers to someone or something that separates or divides objects into chunks or pieces. There are a number of synonyms for this word, such as fragmenter, breaker, splinterer, and divider. Each of these terms connotes the same general idea of splitting something into smaller components. Other synonyms for "chunker" might include words like splitter, carver, cutter, and slicer, depending on the context and the specific way in which the dividing process is accomplished. Whether you're talking about a machine that chunks wood, a person who breaks rocks into smaller pieces, or any other similar process, there are always a variety of words that can describe this action.