Yes, wain is a Scrabble word!
...and is worth 7 points in Scrabble, and 8 points in Words with Friends
wain
Noun
1. English writer (1925-1994)
2. A group of seven bright stars in the constellation Ursa Major
3. Large open farm wagon
What Scrabble words can I make with the letters in wain?
3 Letter Words
2 Letter Words