Proof is valid Scrabble Word

Is proof a scrabble word?
Official Scrabble Players Dictionary YES
Official Tournament and Club Word List YES
Collins Scrabble Words YES
Is proof valid Words with Friends?
Words with Friends YES

Definitions for PROOF in dictionary:

Words related to PROOF

preif10 preife11 prief10 priefe11 prieve11 proofed13 proofing14 proofings15 proofless14 proofs11

How to use PROOF in a sentence

Find what other words can be done using letters: "proof"
https://scrabble-word.com/finder/proof
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