Duck-bill and Duckbill

Duckbill and duck-bill are semantically related. In some cases you can use "Duckbill" instead a noun phrase "Duck-bill".

Duckbill 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.

Duck-bill and duckbill are semantically related. Sometimes you can replace phrase "Duck-bill" with "Duckbill", this terms are similar.