Calapuya is a Native American tribe name that comes from the Chinook Jargon language. If you are looking for synonyms for this word, there are a few alternatives that could be interesting to explore. For instance, you might consider using the term "Kalapuya," which is a different spelling of the original word. Other possible synonyms might be "Wapato," which refers to a type of plant often associated with this tribe, or "Tualatin," which is an alternative name for the tribe that lived in the same area. Other suggestions could include "Willamette Valley Indians" or simply "Chinook Jargon speakers." Ultimately, the best synonym for this word will depend on the context in which it is being used.