There are a few potential synonyms that could be used for the name "Clyde Tombaugh," depending on the context. For example, if you were writing about his contributions to the field of astronomy, you might use phrases like "the discoverer of Pluto" or "pioneering astronomer." If you were describing his personality or character, you might use words like "determined," "curious," or "passionate." Alternatively, you could use his full name and professional titles, such as "Dr. Clyde W. Tombaugh," to emphasize his accomplishments and expertise in his field. Regardless of the synonym you choose, it's clear that Tombaugh left an indelible mark on the world of science and discovery.