It's important to have a variety of synonyms for common phrases like "it could be" in order to make your writing more interesting and engaging. Some alternatives include "it may be," "there's a possibility," "it's feasible," "it's within the realm of possibility," "there's a chance," "it's conceivable," "it's a potential outcome," and "it's not out of the question." By using different synonyms, you can convey the same meaning in a variety of ways, making your writing more dynamic and less repetitive. It's always a good idea to mix it up and keep your writing fresh!