The term "three-ball" can have many synonyms depending on the context. In sports such as basketball and soccer, it can refer to a specific type of play or tactic known as a "triple threat." Similarly, in billiards, it can refer to a game variation known as "3-ball" or "trios." In some cultures, the term "three-ball" can also refer to a pawnbroker's symbol or sign displayed outside of their shop. Other synonyms for "three-ball" can include "trio," "triad," "threesome," "trinity," and "trilogy." Overall, the context of the term will determine which synonym is most appropriate to use.