Yes, urea is a Scrabble word!
...and is worth 4 points in Scrabble, and 5 points in Words with Friends
urea
Noun
1. The chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics
What Scrabble words can I make with the letters in urea?
3 Letter Words
2 Letter Words