Round-trippers are a term used in baseball to describe players who hit a home run and make it all the way around the bases, scoring a run. The two crossword solutions for this term are 'Homers' (6 letters) and 'Dingers' (7 letters). Homers is a slang term for a home run, while Dingers is a slang term for any kind of hit that goes a long distance. Both terms refer to a player hitting a ball far enough to make it all the way around the bases and score a run.