The word you're searching for is passphrase - it's actually considered more secure for passwords n general, too!

Password: "Speak-Melon-Enter"

Done this with mine for years. Along with making the SSID a name rather than a random string of characters. Someone wants to login? I can tell them with a single sentence and no need to look anything up.

You can also just print out a QR code with all the info and stick it to your fridge. No more arguing about capitalization or punctuation. Your guest wifi can now be anything you want and hardly anyone using it will notice what the password actually is. I like to sneak a joke in there to see if anyone's paying attention.

Another pro tip, if you're throwing a parties with larger groups of people, spin up a temporary guest wifi without any password. And put it on a separate VLAN, use device isolation, and throttle that traffic because you were doing that anyway for the guest wifi, right? Comcast/Xfinity is the going monopoly in my area so I usually just name it after their hotspots. Then you don't have to do anything special when randos and +1s want to connect. Most people with the same internet provider probably connected automatically. Of course, you'll need to remember to turn it off later.