When we use the word automobile to refer a category of transpor vehicles are using this as?

When we use the word "automobile" to refer to a category of transport vehicles, we are using it as a hypernym.

Here's why:

* Hypernym: A hypernym is a word that refers to a broader category, encompassing a group of more specific words (hyponyms).

* Hyponyms: Hyponyms are words that fall under a broader category. In this case, hyponyms of "automobile" would include specific types of cars like sedans, SUVs, trucks, and sports cars.

So, "automobile" is a hypernym because it is a general term that covers a range of specific vehicles.