Quechumaran languages
Quechumaran or Kechumaran is a language-family proposal that unites Quechua and Aymara. Quechuan languages, especially those of the south, share a large amount of vocabulary with Aymara. Terrence Kaufman finds the proposal reasonably convincing, but Willem Adelaar, a Quechua specialist, believes the similarities to be caused by borrowing during long-term contact. Lyle Campbell suspects that the proposal is valid but does not consider it to have been conclusively proved.
Moulian et al. posits the Puquina language of the Tiwanaku Empire as a possible source for some of the shared vocabulary between Quechua, Aymara and Mapuche.100-word Swadesh lists of Proto-Aymaran and Proto-Quechuan from Cerrón :
