Yes, hao is a Scrabble word!
...and is worth 6 points in Scrabble, and 5 points in Words with Friends
hao
Noun
1. 10 hao equal 1 dong in Vietnam
What Scrabble words can I make with the letters in hao?
2 Letter Words
Noun
1. 10 hao equal 1 dong in Vietnam
2 Letter Words