Antonyms of noun softball

1 of 2 senses of softball

Sense 2
softball, softball game -- (a game closely resembling baseball that is played on a smaller diamond and with a ball that is larger and softer)
       Antonym of hardball (Sense 2)
      => hardball -- (baseball as distinguished from softball)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun softball

2 senses of softball

Sense 1
softball, playground ball -- (ball used in playing softball)
       => ball -- (round object that is hit or thrown or kicked in games; "the ball travelled 90 mph on his serve"; "the mayor threw out the first ball"; "the ball rolled into the corner pocket")

Sense 2
softball, softball game -- (a game closely resembling baseball that is played on a smaller diamond and with a ball that is larger and softer)
       => baseball, baseball game -- (a ball game played with a bat and ball between two teams of nine players; teams take turns at bat trying to score runs; "he played baseball in high school"; "there was a baseball game on every empty lot"; "there was a desire for National League ball in the area"; "play ball!")