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

2 senses of duckbill

Sense 1
paddlefish, duckbill, Polyodon spathula -- (primitive fish of the Mississippi valley having a long paddle-shaped snout)
       => ganoid, ganoid fish -- (primitive fishes having thick bony scales with a shiny covering)

Sense 2
platypus, duckbill, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus -- (small densely furred aquatic monotreme of Australia and Tasmania having a broad bill and tail and webbed feet; only species in the family Ornithorhynchidae)
       => monotreme, egg-laying mammal -- (the most primitive mammals comprising the only extant members of the subclass Prototheria)

Antonyms of adj duckbill

1 sense of duckbill

Sense 1
duckbill, duck-billed -- (having a beak resembling that of a duck; "a duck-billed dinosaur")

INDIRECT (VIA beaked) -> beakless -- (not having a beak or bill)

Similarity of adj duckbill

1 sense of duckbill

Sense 1
duckbill, duck-billed -- (having a beak resembling that of a duck; "a duck-billed dinosaur")
       => beaked (vs. beakless) -- (having or resembling a beak)