Yes, kern is a Scrabble word!
...and is worth 8 points in Scrabble, and 9 points in Words with Friends
kern
Verb
1. Furnish with a kern
2. Remove a portion of space between (adjacent letters)
Noun
1. United States composer of musical comedies (1885-1945)
2. The part of a metal typeface that projects beyond its body
What Scrabble words can I make with the letters in kern?
3 Letter Words
2 Letter Words