Yes, heed is a Scrabble word!
...and is worth 8 points in Scrabble, and 7 points in Words with Friends
heed
Verb
1. Pay close attention to; give heed to
Noun
1. Paying particular notice (as to children or helpless people)
What Scrabble words can I make with the letters in heed?
3 Letter Words
2 Letter Words