Yes, mild is a Scrabble word!
...and is worth 7 points in Scrabble, and 9 points in Words with Friends
mild
Adjective
1. Moderate in type or degree or effect or force; far from extreme
2. Humble in spirit or manner; suggesting retiring mildness or even cowed submissiveness
3. Mild and pleasant
What Scrabble words can I make with the letters in mild?
3 Letter Words
2 Letter Words