A "good guess" is an estimate or prediction that is accurate or close enough to the truth. Some synonyms for this term include "educated guess," "well-informed assumption," "informed speculation," "intelligent conjecture," "reasonable inference," and "sensible prediction." Other possibilities might include "astute estimation," "well-considered projection," "logical deduction," "sound surmise," and "thoughtful hypothesis." These synonyms suggest a level of intelligence, reasoning, and intuition involved in making a good guess. Whether it comes from experience, expertise, or intuition, a good guess can help people make important decisions and solve problems in various situations.