The word "peepeeing" is a colloquial term used to describe the act of urinating. However, there are many synonyms for this term that can be used in order to describe the same act in a more formal or professional context. Some other synonyms for "peepeeing" include urinating, micturating, voiding, and relieving oneself. Each of these terms can be used in medical contexts or in more formal writing, such as in academic papers or scientific reports. Additionally, there are many slang terms for the act of urinating that people use in informal conversations, such as "taking a leak" or "going to the bathroom".