There are a variety of synonyms for the phrase "more shadow" that can variety in both intensity and connotation. Alternative phrases include increased darkness, heightened obscurity, elevated shade, amplified dimness, and augmented gloom. These terms can be used to describe anything from a deeper shadow cast in a photograph to a more ominous cloud overhead. Depending on the context, the use of a different synonym for "more shadow" can change the mood or tone of a piece of writing. Ultimately, the choice of word should depend on what effect the writer is trying to convey to their audience.