Recherches is a French word that means "research" or "investigations." If you're searching for synonyms to use instead of recherches in your writing or speech, there are several options available. For example, in English, the term "investigation" is often used in place of recherches because it carries a similar meaning. Additionally, "inquiry," "exploration," and "examination" are also effective synonyms for recherches that you can use in different contexts. The word "study" conveys a similar concept as well and could be helpful when discussing systematic research in a particular field or subject.