Story is a dynamic narrative with a beginning, a middle, and an end. Many elements contribute to successful story including characterization (William Faulkner,) lively dialogue (George V. Higgins,) an exciting concept (Michael Crichton,) mood (Shirley Jackson,) or a wild plot (Randy Wayne White.) You construct them all with words. How many words? However many you need to achieve the effect. Can you use too many words? You sure can, but words are the building blocks of story. Whenever I see that asinine challenge, what’s the scariest story you can tell in six words, I want to shake the challenger by the collar. You can’t build a house with six bricks.
Some authors are drunk on words. Anthony Burgess, Michael Chabon, and Marlon James come to mind. Some authors parcel their words like Ebeneezer Scrooge. Cormac McCarthy and Ernest Hemingway. However you do it, the goal is the same: to grab the reader by the throat and drag him into the narrative to the exclusion of all else. You want to write a book that makes the reader resent anything that interrupts his reading.