Yes, lagoon is a Scrabble word!
...and is worth 7 points in Scrabble, and 10 points in Words with Friends
lagoon
Noun
1. A body of water cut off from a larger body by a reef of sand or coral
What Scrabble words can I make with the letters in lagoon?
5 Letter Words
4 Letter Words
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3 Letter Words
2 Letter Words