Yes, wail is a Scrabble word!
...and is worth 7 points in Scrabble, and 8 points in Words with Friends
wail
Verb
1. Emit long loud cries
2. Cry weakly or softly
Noun
1. A cry of sorrow and grief
What Scrabble words can I make with the letters in wail?
3 Letter Words
2 Letter Words