Yes, unai is a Scrabble word!
...and is worth 4 points in Scrabble, and 6 points in Words with Friends
unai
Noun
1. A sloth of Central America that has two long claws on each forefoot and three long claws on each hindfoot
2. Relatively small fast-moving sloth with two long claws on each front foot
What Scrabble words can I make with the letters in unai?
3 Letter Words
2 Letter Words