Yes, hens is a Scrabble word!
...and is worth 7 points in Scrabble, and 7 points in Words with Friends
hens
Noun
1. Adult female chicken
2. Adult female bird
3. Flesh of an older chicken suitable for stewing
4. Female of certain aquatic animals e.g. octopus or lobster
What Scrabble words can I make with the letters in hens?
3 Letter Words
2 Letter Words