If you're looking for synonyms for pirate captain, you might find these terms useful. The most basic synonym for a pirate captain is simply 'captain'; this can be used to refer to any captain in charge of a ship, whether they are a pirate or not. Other synonyms for pirate captain might include 'buccaneer leader', 'corsair commander', or 'privateer chief'. You could also use more descriptive terms like 'seafaring swashbuckler', 'oceanic outlaw', or 'maritime marauder'. All of these terms evoke the rough and rugged world of pirates, suggesting a leader who is daring, dangerous, and unafraid of the open sea.