An app that randomly displays the words you enter. Add an input field, an input button, and a display button. If you can update to a more technically advanced app, GPT should think about it and change it.

Random Word Generator

Type in some words below and click "Add Word" to add them to the list:

Here are your words:

Sure, I can create this app for you. Here is the code for a single HTML file that randomly displays the words that are entered in the input field when the display button is clicked. 

You can copy and paste this code into a new HTML file and view it in your browser:

```
<!DOCTYPE html>
<html>
<head>
	<title>Random Word Generator</title>
</head>
<body>

	<h1>Random Word Generator</h1>

	<p>Type in some words below and click "Add Word" to add them to the list:</p>

	<input type="text" id="new-word-input">
	<button onclick="addWord()">Add Word</button>

	<p>Here are your words:</p>

	<ul id="word-list"></ul>

	<button onclick="displayRandomWord()">Display Random Word</button>

	<script>
		var words = [];

		function addWord() {
			var newWordInput = document.getElementById("new-word-input");
			var newWord = newWordInput.value;
			if (newWord !== "") {
				words.push(newWord);
				newWordInput.value = "";
				updateWordList();
			}
		}

		function updateWordList() {
			var wordList = document.getElementById("word-list");
			wordList.innerHTML = "";
			for (var i = 0; i < words.length; i++) {
				var listItem = document.createElement("li");
				listItem.innerText = words[i];
				wordList.appendChild(listItem);
			}
		}

		function displayRandomWord() {
			var randomNumber = Math.floor(Math.random() * words.length);
			var randomWord = words[randomNumber];
			alert("Your random word is: " + randomWord + "!");
		}
	</script>

</body>
</html>
```

I hope you find this app useful! As for a funny joke related to the content of the app, here it is: Why did the computer go to the doctor? Because it had a virus!