Areal linguistics is the study of diffused linguistic features across different languages which are geographically contiguous and culturally connected. My research attempts to standardize definitions for the vocabulary surrounding linguistic diffusion which will apply cross-areally. I also examine these definitions within the case study of the Pueblo and Southwest regions of North America. These areas have been culturally linked, but no agreement has been made as to whether or not these make up a linguistic area with sub-areas or are both part of a much larger area including the Great Basin, southern Plains, and southern Californian languages