All the words you know (10)

I believe the answer is:

vocabulary

(Other definitions for vocabulary that I've seen before include "List of words" , "Words an individual knows" , "Range of words" , "Knowledge of words" , "Word list" .)

I've seen this clue in the Newsday.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.