The term "birch family" generally refers to the Betulaceae family of trees and includes several species such as birches, alders, and hornbeams. The Betulaceae family is characterized by their distinctive bark, leaves, and catkins. However, there are several synonyms that one can use instead of the term "birch family." For example, one can use the term "Betulaceae" for a more formal or scientific reference. Similarly, one can also use the term "hazel family" since hazels are closely related to the Betulaceae family. Lastly, one can use the term "alder family" since alders are an important member of this family and are often used interchangeably with birches in different cultures around the world.