Genus Bucephala is a scientific term used to describe a group of diving ducks found in North America. Synonyms for this word are other scientific names that have been used to refer to this group of birds in the past. Some examples of these synonyms include Bucephala clangula, Bucephala albeola, Bucephala islandica, and Bucephala angustirostris. These synonyms may be used by researchers or scientists when referring to the same group of birds as Genus Bucephala. It's important to note that the use of synonyms in scientific naming has evolved and changed over time, and as such, some of these names may be outdated or no longer in regular use.