What makes a ChatGPT buzzword
The category is not really about vocabulary. It is about a specific habit: producing a sentence that sounds like a summary of a topic rather than a statement about it. The buzzwords are the visible surface of that habit.
That is why the same twenty words appear across essays about marketing, medicine and municipal water policy. The subject changes; the register does not. A model defaults to a balanced, upbeat, slightly formal voice because that voice is safe across an enormous range of prompts.
The buzzword is therefore a symptom. Remove the word and keep the sentence shape, and the reader still feels it. Remove the shape, and the word list stops mattering.