Scoter is a type of marine bird that belongs to the family of sea ducks. The word "scoter" may have various synonyms, depending on their species or regional names. For instance, Black Scoter is also known as the American Black Scoter, Surf Scoter as the Surf Duck, and the White-winged Scoter as the Velvet Scoter. Other common synonyms for Scoter include Coot Duck, Black Duck, and Sea Coot. Moreover, Oldsquaw is a synonym for Long-tailed Duck with a few regional differences. In summary, names may vary for the same type of bird, and different birdwatchers and ornithologists may use different synonyms for scoter, depending on their preference and experience.