“letter proof”

We have one entry that includes the term letter proof.

open-letter proof

noun

: a proof (as of an engraving) with title or other inscription in outline letters

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Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
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Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Word Game Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
Missing Letter A daily crossword with a twist
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Synonym Sandwich Quiz Connect two unrelated words by picking a word syn...