Yes, volt is a Scrabble word!
...and is worth 7 points in Scrabble, and 9 points in Words with Friends
volt
Noun
1. A unit of potential equal to the potential difference between two points on a conductor carrying a current of 1 ampere when the power dissipated between the two points is 1 watt; equivalent to the potential difference across a resistance of 1 ohm when 1 ampere of current flows through it
What Scrabble words can I make with the letters in volt?
3 Letter Words
2 Letter Words