Definitions:

1. A recreational or sporting vehicle, fitted with ice skates or runners, or blades, and designed to travel across ice surfaces. NOUN
   • Ice iceboat's sails billowed in the winter wind, propelling it effortlessly across the frozen expanse.
2. A ship with a reinforced bow to break ice and keep channels open for navigation. NOUN
   • The iceboat set out to chop a hole in the ice.

Synonyms:

• ice boat
• ice yacht
• icebreaker
• scooter