Partitioner refers to a software component that is responsible for partitioning data into smaller parts that can be processed more effectively. Some of the synonyms for partitioner include splitter, divider, segmenter, and segregator. Splitter is a popular synonym that refers to the software that divides data into smaller chunks for processing. Divider denotes a component that divides data into parts that can be easily processed. Segmenter is a term that refers to a component that slices data into small segments. Segregator refers to a component that segregates data into various categories for better processing. Despite the differences in their meanings, all these synonyms describe a software component that partitions data for efficient processing.