This phenomena where two nouns are placed side by side is called apposition: https://en.wikipedia.org/wiki/Apposition#Restrictive_versus_non-restrictive https:

This phenomena where two nouns are placed side by side is called apposition: https://en.wikipedia.org/wiki/Apposition#Restrictive_versus_non-restrictive https://en.wikipedia.org/wiki/Apposition#Restrictive_versus_... So the source of the confusion is that, in English, non-restrictive appositives typically are indicated with commas, but so are lists of conjuncts.