The phrasal verb "be strewn" means to be scattered or spread out. There are several synonyms for this expression, including littered, strewed, scattered, sprinkled, and dotted. Each of these words implies a different way of spreading out. For example, "littered" implies a messiness, while "strewed" is a more intentional way of spreading things out. "Scattered" suggests a random distribution, while "sprinkled" implies a lighter application of something on a surface. Finally, "dotted" suggests a series of small, separate points. While they all have similar meanings, each synonym offers a slightly different way of describing how things are spread out or scattered.