Any word you find must be made up of the exact letters selected in the correct sequence and in the exact locations where the game expects them to be. So even if you have the correct word, the game will reject it if it knows that one of the letters in fact belongs to a different word, or you selected the letters in the wrong order.
Having trouble finding a word?
The puzzles
Going up in size (6 x 6)
Quite difficult (7 x 7)
Challenging (7 x 7)
A bit of a theme here (7 x 7)
Something's cooking (8 x 8)
The big one (9 x 9)
A few big words (8 x 8)
Nothing special (8 x 8)
Out in the garden (8 x 8)
Time to get in shape (8 x 8)
Just a quickie (6 x 6)
Play it again Sam (8 x 8)
Meow (8 x 8)
A trip around the world (8 x 8) Country names
What a capital idea (8 x 8) Country capitals
Just words (7 x 7)
Small is the new big (5 x 5)
No risk of organ failure (6 x 6)