Yes, miaou is a Scrabble word!
...and is worth 7 points in Scrabble, and 9 points in Words with Friends
miaou
Verb
1. Make a cat-like sound
Noun
1. The sound made by a cat (or any sound resembling this)
What Scrabble words can I make with the letters in miaou?
3 Letter Words
2 Letter Words
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Words that can be created with an extra letter added to miaou:
S:miaous