The word lists are different
This is the most practically important difference. Words with Friends uses ENABLE (Enhanced North American Benchmark LExicon). Scrabble uses NWL (North America) or CSW (international Collins).
The overlap is large — maybe 90% of common words are valid in both. But the edges matter. Words like FROE, GROAT, TACE are valid in NWL but rejected in ENABLE. Conversely, some words accepted by ENABLE don't appear in NWL. If you play competitively in either game, you need to know which list you're on.
Rule of thumb: if you learned a word from tournament Scrabble study, verify it works in WWF before playing it. A challenge from your opponent won't show mercy for cross-game assumptions.
Tile values diverge on several letters
High-value tiles (J=10, Q=10, Z=10, X=8) are the same in both games. But several mid-value tiles score differently. This changes which words are most valuable on a given rack.
| Letter | Scrabble (NWL) | Words with Friends | Difference |
|---|---|---|---|
| B | 3 pts | 4 pts | +1 in WWF |
| C | 3 pts | 4 pts | +1 in WWF |
| D | 2 pts | 2 pts | Same |
| F | 4 pts | 4 pts | Same |
| H | 4 pts | 3 pts | −1 in WWF |
| L | 1 pts | 2 pts | +1 in WWF |
| M | 3 pts | 4 pts | +1 in WWF |
| N | 1 pts | 2 pts | +1 in WWF |
| P | 3 pts | 4 pts | +1 in WWF |
| R | 1 pts | 1 pts | Same |
| U | 1 pts | 2 pts | +1 in WWF |
| V | 4 pts | 5 pts | +1 in WWF |
| W | 4 pts | 4 pts | Same |
| Y | 4 pts | 3 pts | −1 in WWF |
The board layout is different
Both boards are 15×15 grids, but premium square positions differ. The WWF board has triple-letter squares closer to the center and a different arrangement of double-word squares. This means opening move theory from Scrabble doesn't directly transfer.
In Scrabble, the four TWS (triple-word-score) squares in the corners are the most contested real estate. In WWF, the bonus squares are distributed differently, making the mid-board premium squares more central to strategy.
The bingo bonus is smaller in WWF
Playing all 7 tiles in one turn earns 35 bonus points in WWF, versus 50 in Scrabble. This changes the calculus around holding tiles for bingo setups. In Scrabble, the 50-point bonus is often worth sacrificing a medium-scoring play to keep a bingo-friendly rack. In WWF, the smaller bonus makes this tradeoff less clear-cut.
Which tool should you use?
If you're playing Words with Friends, use the WWF cheat tool — it uses ENABLE and calculates WWF tile values.
If you're playing Scrabble, use the Scrabble unscrambler — which supports NWL, CSW, and ENABLE with correct Scrabble tile values.
Using the wrong tool will give you scores that don't match your game and may suggest words that aren't valid.