Yes, food is a Scrabble word!
...and is worth 8 points in Scrabble, and 8 points in Words with Friends
food
Noun
1. Any substance that can be metabolized by an animal to give energy and build tissue
2. Any solid substance (as opposed to liquid) that is used as a source of nourishment
3. Anything that provides mental stimulus for thinking
What Scrabble words can I make with the letters in food?
2 Letter Words