TWL vs SOWPODS vs Words With Friends: dictionary differences explained

Why word games disagree about what's a word

It feels strange that "Scrabble" and "Words With Friends" could ever disagree about whether something is a real word — but they were never working from the same book. Each game checks your play against a fixed word list, and those lists were built by different organisations, for different purposes, at different times. None of them were designed to match the others, so gaps between them are not bugs. They are just the natural result of three sets of editorial choices about what counts as a playable word.

That is why the same rack of tiles can produce a different score depending on where you are sitting in the world. A search that returns 40 words under TWL might return more than 50 under SOWPODS, simply because the underlying lists are different sizes with different inclusion rules. Understanding the three big lists — and where they part ways — is the fastest way to stop guessing and start playing borderline words with confidence.

TWL — the North American list

TWL stands for Tournament Word List, and it is the dictionary used for sanctioned Scrabble club and tournament play in the United States, Canada, Israel and Thailand. In recent years it has been rebranded as the NWL (NASPA Word List), but most players still call it TWL, and the two names refer to the same North American word source. It is the list most American and Canadian players grow up with, and it is somewhat more conservative than the international list about which words it admits.

There have been several editions over the years as the list gets revised and expanded. For a casual home game it rarely matters which exact edition you use, as long as both players agree beforehand. For a sanctioned tournament, the organisers will tell you which version is in effect — so when validity really counts, confirm the edition rather than assuming.

SOWPODS — the international list

SOWPODS is the dictionary used almost everywhere outside North America: the UK, Australia, Europe, Africa, Asia and most international online play run on it. Its modern official name is Collins Scrabble Words, abbreviated CSW. (The odd name "SOWPODS" is a historical mashup of two older source dictionaries, and the term stuck.) The defining feature is size: it is noticeably larger than TWL, so more letter combinations resolve into a valid word.

That extra size is the single biggest reason international and North American players sometimes disagree on a word. A play that is perfectly legal under SOWPODS may simply not exist in TWL — and occasionally the reverse — even though both are recognised, official Scrabble dictionaries. If you play international online Scrabble or compete outside North America, SOWPODS is almost certainly your list.

Words With Friends — its own list

Words With Friends does not use TWL or SOWPODS at all. The app checks plays against its own proprietary word list, built specifically for mobile play. That list has its own personality: it leans toward commonly recognised vocabulary, has historically been quicker to accept some modern, everyday terms, and at the same time omits a fair number of the obscure short words that tournament Scrabble dictionaries carry.

So if you play a word in Words With Friends that gets rejected even though you are sure it is in "the Scrabble dictionary," this is usually why — the app was never checking against a Scrabble dictionary in the first place. The gaps run in both directions: some words pass in Words With Friends but not in Scrabble, and plenty of valid Scrabble words do not make the cut in Words With Friends.

The three lists side by side

Treat the word counts above as approximate and rounded — every list is revised periodically, so the exact totals drift over time. The shape of the comparison is what matters: SOWPODS is the broadest, TWL is the more conservative North American option, and Words With Friends is a separate list with its own rules.

Real example words that differ between lists

Generalities are easy to remember wrongly, so here are concrete cases. These are well-known, frequently cited examples — but because all three lists are updated over time, treat them as illustrations and confirm in-game when a serious challenge is on the line.

Valid in SOWPODS but historically not in older TWL editions:

• ZA — short for "pizza"; long a SOWPODS staple
• QI — life force (also spelled "chi")
• EW — exclamation of disgust, added more recently
• OK — the everyday word, a late addition to play lists

Words like ZA and QI are the classic short plays that international SOWPODS players reach for routinely, and that North American players sometimes had to learn were valid (or not) depending on the edition in front of them. Newer everyday entries such as EW and OK show how the lists evolve: a word that was unplayable for years can quietly become legal in a later revision. That is exactly why "I'm sure it's a word" is not a reliable defence — what matters is whether it is in this game's list, in this edition.

Where Scrabble and Words With Friends part ways: the most reliable pattern is the short, obscure words. Scrabble's dictionaries carry a long tail of two- and three-letter words borrowed from music, card games, regional dialects and old usage — many of which Words With Friends simply does not accept. In the other direction, Words With Friends has at times accepted casual, modern terms a touch ahead of the tournament lists. Rather than memorising a universal table that changes anyway, most players do better keeping a personal mental note of the specific words they tend to get rejected on in each game.

What this means for a word unscrambler

When you use a word finder, the dictionary you choose changes the answers you get back. Run the same letters under a North American list and an international list and the second one will usually return more words, because it is checking against a bigger vocabulary. Set the tool to the Words With Friends list and you will get a third, app-specific set of results. None of these is "wrong" — each is simply answering the question "which words are legal in my game?"

That is why our Word Unscrambler includes a dictionary selector for TWL, SOWPODS and WWF. Before you trust a borderline result, set the selector to match the game you are actually playing. A search set to SOWPODS can hand you a word your opponent will successfully challenge if they are playing TWL — so matching the dictionary is the difference between a confident play and a costly one.

Which dictionary should you pick?

The choice is genuinely simple once you frame it around the game in front of you rather than around which list is "best":

• Competitive Scrabble in the US, Canada, Israel or Thailand? Use TWL (NWL).
• Competitive Scrabble anywhere else, or international online play? Use SOWPODS (CSW).
• Playing the Words With Friends app? Use the Words With Friends list — TWL and SOWPODS results will not always match what the app accepts.
• Casual home game? Agree on one dictionary with your opponents before the first tile goes down, and stick with it for the whole game.

There is no single "correct" dictionary; the right one depends entirely on what you are playing and where. When the stakes are high — a sanctioned tournament or a close match — confirm the exact list and edition in the official rules or the app's settings, then set your word finder to match. For everyday play, the rule of thumb above will keep you out of almost every argument.

The bottom line

TWL is North American, SOWPODS is international, and Words With Friends is its own thing — three lists that overlap heavily but are not identical. The words that differ tend to be the short, obscure ones and the occasional modern term, and the lists keep evolving, so even a confident memory can be out of date. The fix is never memorising every discrepancy. It is confirming which dictionary applies before you rely on a borderline word, and setting your tools to match.