Speedball is a term used to describe a hybrid sport that combines elements of both baseball and American football. However, there are several antonyms for the term 'speedball' that refer to sports or activities that are slower or more relaxed. Some antonyms for speedball include chess, croquet, archery, golf, and billiards, among others. Furthermore, the antonyms for 'speedball' may also encompass different forms of slower-paced or gentler physical activities that require less agility and speed, such as yoga, tai chi, or hiking. In general, antonyms for the term 'speedball' revolve around activities that emphasize mental focus, precision, gracefulness, and leisurely enjoyment instead of fast-paced competition.