"Be found in" is a commonly used phrase that describes the location or presence of something. However, there are a variety of synonyms that can be used instead of "be found in" to add variety and richness to your writing. Some options include "reside in," "exist within," "be located in," "occur in," "inhabit," and "dwell within." These alternatives can be selected based on the specific context and tone of your writing. By using synonyms for "be found in," you can make your writing more engaging and effective at conveying your intended message.