Yes, kind is a Scrabble word!
...and is worth 9 points in Scrabble, and 10 points in Words with Friends
kind
Adjective
1. Having or showing a tender and considerate and helpful nature; used especially of persons and their behavior
2. Agreeable, conducive to comfort
3. Tolerant and forgiving under provocation
Noun
1. A category of things distinguished by some common characteristic or quality
What Scrabble words can I make with the letters in kind?
3 Letter Words
2 Letter Words