How can I create a Javascript array from JSON [duplicate]

I have searched a lot for this and I can not find anything that answers the specific problem that I am having. I am tying to make a game with vanilla javascript that for the simplicity of this post is similar to wordle. I need to compare user typed words against a large list of words. I have found a website that has what I need as a json object. Here is the website -> https://www.wordgamedictionary.com/word-lists/3-letter-words/3-letter-words.json or an example in case you don’t want to see the whole thing

[
{
"word": "aah"
},
{
"word": "aal"
},
{
"word": "aas"
}
]

I was able to use fetch to get the file into my main.js script using fetch

    fetch("./json/3-letter-words.json")
        .then(response => response.json())
        .then(data => {
            console.log(data)
        })

but I can’t figure out any way to use it. I want to be able to check if a user typed word is in the object and each entry only has one attribute so I figured converting it to an array of strings would be best but I just don’t know how to do that. I am currently not using any libraries or frameworks and would like to keep it that way since that is part of the point of this project. If you have any tips it would be greatly appreciated!