Theoretical probability is a term used in mathematics to describe the likelihood of an event occurring based on mathematical principles. Some synonyms for theoretical probability could include statistical probability, mathematical probability, or calculated probability. These terms all suggest that the probability of an event occurring can be calculated based on mathematical formulas and rules. Other synonyms for theoretical probability might include expected probability, anticipated probability, or hypothetical probability - all of which suggest that the probability being discussed is based on an expectation or prediction rather than direct observation. Regardless of the specific term used, these synonyms all refer to the same mathematical concept of calculating the probability of a specific outcome.