Noun

• S: (n) amphibian, amphibious vehicle (a flat-bottomed motor vehicle that can travel on land or water)
• S: (n) amphibian, amphibious aircraft (an airplane designed to take off and land on water)
• S: (n) amphibian (cold-blooded vertebrate typically living on land but breeding in water; aquatic larvae undergo metamorphosis into adult form)

Adjective

• S: (adj) amphibious, amphibian (relating to or characteristic of animals of the class Amphibia)