AJUGA

Yes. "AJUGA" is in the ENABLE word list, accepted by Words With Friends and most open Scrabble apps. It scores 13 points in Scrabble and 17 points in Words With Friends.

In Scrabble, "AJUGA" is worth 13 points before bonuses. In Words With Friends, it's worth 17 points. Played on a triple-word-score, the Scrabble value becomes 39.

Any plant in the genus Ajuga, especially the ornamental ground cover Ajuga reptans.

No, "AJUGA" has no anagrams in the ENABLE dictionary — it's the only word that can be formed from its exact letters.