What category could the words infidel android and somnambulist be grouped under?

The Words "infidel," "Android," and "somnambulist" could be grouped under the category of "Vocabulary." These Words represent different types of language: "infidel" is a noun referring to someone who does not believe in a particular religion, "Android" is a noun describing a robot with human-like features, and "somnambulist" is a noun referring to a sleepwalker. The category of Vocabulary encompasses Words that represent a wide range of meanings and concepts.