When writing, it's always good to have alternative ways of expressing the same idea. One common phrase used to suggest a hypothetical situation is "in the event or the case that." But there are many other words or phrases that can convey a similar meaning. "For the circumstance that" is a more formal option, while "should" can be used in a slightly more casual context. "In the instance that" or "if" are also common alternatives. Another possibility is "assuming that" or "supposing that," which can give a more uncertain tone to the hypothetical situation. In summary, using different words and phrases for "in the event or the case that" can add variety and nuance to your writing.