The word "filterer" refers to someone or something that filters. There are a variety of synonyms that can be used in place of "filterer," including strainer, sieve, purifier, clarifier, separator, and extractor. A strainer is a utensil used to strain liquid or food particles, while a sieve is a tool for separating dry ingredients. A purifier is a device used to remove impurities from air or water, while a clarifier is used to remove solids from liquids. A separator is a machine for separating different substances, and an extractor is a tool for extracting essential oils or juices from plants. Each synonym for "filterer" has its own usage and meaning.