Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun amphibian

3 senses of amphibian

Sense 1
amphibian, amphibious vehicle -- (a flat-bottomed motor vehicle that can travel on land or water)
       => motor vehicle, automotive vehicle -- (a self-propelled wheeled vehicle that does not run on rails)

Sense 2
amphibian, amphibious aircraft -- (an airplane designed to take off and land on water)
       => airplane, aeroplane, plane -- (an aircraft that has a fixed wing and is powered by propellers or jets; "the flight was delayed due to trouble with the airplane")

Sense 3
amphibian -- (cold-blooded vertebrate typically living on land but breeding in water; aquatic larvae undergo metamorphosis into adult form)
       => vertebrate, craniate -- (animals having a bony or cartilaginous skeleton with a segmented spinal column and a large brain enclosed in a skull or cranium)

Similarity of adj amphibian

1 sense of amphibian

Sense 1
amphibious, amphibian -- (relating to or characteristic of animals of the class Amphibia)