| Word | Definitions | Synonyms |
|---|---|---|
| ballpen | (noun) a pen that has a small metal ball as the point of transfer of ink to paper | Synonyms: ballpoint, ballpoint pen, Biro |
| bullpen | (noun) a large cell where prisoners (people awaiting trial or sentence or refugees or illegal immigrants) are confined together temporarily | Synonyms: detention cell, detention centre |
| (noun) a place on a baseball field where relief pitchers can warm up during a game | - |