diff --git a/src/App.tsx b/src/App.tsx
index ed9a490..41175ae 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,7 +1,7 @@
 import React, { useEffect, useRef } from "react";
 import "./App.css";
 
-import useAppState from "./useAppState";
+import useAppState, { normalizeWord } from "./useAppState";
 
 function App() {
   const [state, dispatch] = useAppState();
@@ -20,14 +20,21 @@ function App() {
               type: "load-data",
               wordPack: text
                 .split("\n")
-                .map((word) =>
-                  word.toLowerCase().trim().replaceAll(/\s+/g, " "),
-                )
+                .map((word) => normalizeWord(word))
                 .filter(Boolean),
             }),
-          3000,
+          0,
         );
       });
+
+    fetch("https://unpkg.com/naught-words@1.2.0/en.json")
+      .then((response) => response.json())
+      .then((jsonObj) => {
+        dispatch({
+          type: "load-banned-words",
+          bannedWords: jsonObj.map((word: string) => normalizeWord(word)),
+        });
+      });
   }, [dispatch]);
 
   // Handle the focus of the buttons / input box, even when clicked off
@@ -76,7 +83,6 @@ function App() {
             >
               Begin new game
             </button>
-            <pre>{JSON.stringify(state, null, 2)}</pre>
           </div>
         );
       }
@@ -108,7 +114,6 @@ function App() {
             Correct Guesses: {state.numWordsGuessed} || Skipped words:{" "}
             {state.numWordsSkipped}
           </span>
-          <pre>{JSON.stringify(state, null, 2)}</pre>
         </div>
       );
     }
@@ -131,7 +136,6 @@ function App() {
           >
             Play again
           </button>
-          <pre>{JSON.stringify(state, null, 2)}</pre>
         </div>
       );
     }
diff --git a/src/useAppState.ts b/src/useAppState.ts
index dac2372..734aa9d 100644
--- a/src/useAppState.ts
+++ b/src/useAppState.ts
@@ -4,6 +4,7 @@ type State = Readonly<
   | {
       phase: "pre-game";
       wordPack: readonly string[] | null;
+      bannedWords: readonly string[] | null;
     }
   | {
       phase: "in-game";
@@ -13,6 +14,7 @@ type State = Readonly<
       numWordsGuessed: number;
       numWordsSkipped: number;
       wordPack: readonly string[] | null;
+      bannedWords: readonly string[] | null;
     }
   | {
       phase: "post-game";
@@ -20,6 +22,7 @@ type State = Readonly<
       numWordsGuessed: number;
       numWordsSkipped: number;
       wordPack: readonly string[] | null;
+      bannedWords: readonly string[] | null;
     }
 >;
 
@@ -31,6 +34,7 @@ type Round = Readonly<{
 
 type Action =
   | { type: "load-data"; wordPack: readonly string[] }
+  | { type: "load-banned-words"; bannedWords: readonly string[] }
   | { type: "start-game" }
   | { type: "end-game" }
   | { type: "skip-word" }
@@ -42,6 +46,7 @@ function getInitialState(): State {
   return {
     phase: "pre-game",
     wordPack: null,
+    bannedWords: null,
   };
 }
 
@@ -50,20 +55,33 @@ function getRandomWord(state: State): string {
   return words[Math.floor(Math.random() * words.length)];
 }
 
-function normalizeWord(word: string): string {
-  return word.toLowerCase().trim().replaceAll(/\s+/g, " ");
+export function normalizeWord(word: string): string {
+  return word.toUpperCase().trim().replaceAll(/\s+/g, " ");
 }
 
-function scrambleWord(word: string): string {
+function scrambleWord(word: string, bannedWords: readonly string[] | null): string {
   if (word.length < 2) return word; // Shouldn't matter in this game, but works as a safety net
   let res = word;
-  while (res === word) {
+  let attempts = 0;
+  while (res === word && attempts < 10) {
+    // Scramble the word
     const wordArray = word.split("");
     for (let i = wordArray.length - 1; i > 0; i--) {
       const j = Math.floor(Math.random() * (i + 1));
       [wordArray[i], wordArray[j]] = [wordArray[j], wordArray[i]];
     }
     res = wordArray.join("");
+    attempts++;
+
+    // Confirm there's no naughty words in the scramble.
+    if (bannedWords) {
+      for (const bannedWord of bannedWords) {
+        if (res.includes(bannedWord)) {
+          res = word; // Reset to original word
+          break;
+        }
+      }
+    }
   }
   return res;
 }
@@ -72,7 +90,7 @@ function startNewRound(state: State): Round {
   const base = getRandomWord(state);
   return {
     goal: base,
-    scrambledWord: scrambleWord(base),
+    scrambledWord: scrambleWord(base, state.bannedWords),
     wasGuessed: false,
   };
 }
@@ -97,6 +115,7 @@ function reducer(state: State, action: Action): State {
         numWordsGuessed: 0,
         numWordsSkipped: 0,
         wordPack: state.wordPack,
+        bannedWords: state.bannedWords,
       };
     case "end-game":
       if (state.phase !== "in-game") break;
@@ -106,6 +125,7 @@ function reducer(state: State, action: Action): State {
         numWordsGuessed: state.numWordsGuessed,
         numWordsSkipped: state.numWordsSkipped,
         wordPack: state.wordPack,
+        bannedWords: state.bannedWords,
       };
     case "skip-word":
       if (state.phase !== "in-game") break;