When looking for synonyms for the word "ballparks," there are a few options that can be used interchangeably. These include "stadiums," "arenas," and "fields." Stadiums typically refer to larger, more formal structures that are used for professional or collegiate sports, while arenas may be used for a variety of events and concerts. Fields can be used to describe outdoor spaces that are specifically designed for sports like baseball or soccer. Other synonyms for "ballparks" might include "sports complexes," "grounds," or even "pitches." Depending on the context and the specific sport or event being discussed, any of these synonyms may be appropriate to use.