There are numerous synonyms for the phrase "are found in." Some common alternatives include "can be located within," "exist in," "are present in," "are situated in," "reside within," "occur within," "can be discovered in," and "are contained in." These synonyms can be used interchangeably in a variety of contexts, whether it's discussing the location of objects, describing where certain information can be found, or analyzing data. Using synonyms for commonly used phrases can help to add variety to one's writing or speech, as well as avoid repetitive language.