The phrase "be strewn with" typically means something is scattered across a specific area. There are several synonyms that can be used in place of "strewn with" to convey the same meaning, including "scattered with," "littered with," "covered with," and "peppered with." All of these phrases can be used to describe an area with scattered debris, objects, or items. Additionally, "spotted with" or "sprinkled with" can also work in certain contexts, particularly when referring to a smaller number of scattered items. Overall, there are many different ways to convey the idea of something being scattered across a surface or area, each with their own unique connotations.