Bucephalus /bū-sefˈə-ləs/

1. Alexander the Great's famous warhorse
2. Any horse (familiar or facetious)

• powerfulness
• powerfulnesses
• powerhouse
• powerhouses
• powering
• power lathe
• power lathes
• powerless
• powerlessly
• powerlessness
• powerlessnesses
• powerlifting
• powerliftings
• power line
• power lines
• power loom
• power looms
• power lunch
• power lunches
• power nap
• power naps
• power of attorney
• power of the keys
• power-on self-test
• power pack