duckbill vs paddlefish

duckbill and paddlefish both are nouns.

Word	Noun	Adjective	Verb	Adverb
duckbill	Yes	Yes	No	No
paddlefish	Yes	No	No	No

As nouns, duckbill and paddlefish are synonyms defined as:

duckbill and paddlefish: primitive fish of the Mississippi valley having a long paddle-shaped snout

Other synonyms of duckbill include Polyodon spathula.

duckbill (noun)	paddlefish (noun)
small densely furred aquatic monotreme of Australia and Tasmania having a broad bill and tail and webbed feet; only species in the family Ornithorhynchidae	primitive fish of the Mississippi valley having a long paddle-shaped snout
primitive fish of the Mississippi valley having a long paddle-shaped snout

duckbill (adjective)	paddlefish (adjective)
having a beak resembling that of a duck