A "matchbook course" refers to a very short golf course that can fit on the back of a matchbook. To describe such a course, one could use synonyms such as "pitch and putt," "executive course," "par-3 course," or "short course." These terms all describe smaller and more manageable golf courses that are often designed for beginners or those who want to work on their short game. While they may not offer the same challenge as a full-sized course, they can be a fun and low-pressure way to learn the sport. Additionally, many of these courses are located in urban areas where space is limited, making them a great option for players who live in cities.