Air boat—
1. a seaplane with a boatlike fuselage.

- This class of seaplanes, variously termed “flying-boat” and “air-boat,” consists essentially of a long boat-shaped hull, wherein the passengers’ seats are contained.
2. a shallow-draft boat driven by an airplane propeller.

- A Pandora’s Box is opening to release a flood of airboats on the long-suffering landscape of crowded Southern Ontario.
Inflatable boat—an air-filled rubber boat (for use in an emergency, etc.)

- The crewmen had to be pulled from the freez ing water by colleagues in an inflatable boat.