The phrase "in dreams" can be substituted with several other synonyms to add variety and depth to your writing. For example, you can use terms such as "in one's sleep," "in the subconscious," or "in the realm of the imagination." These phrases offer different shades of meaning, depending on the context of your writing. "In one's sleep" implies a physical state of being asleep, whereas "in the subconscious" refers to a psychological state where thoughts and feelings are suppressed. "In the realm of the imagination" suggests a place where anything is possible, including the fantastic, the surreal, and the impossible. All of these synonyms can enrich your writing and add an extra layer of meaning to your work.