FERNS

Yes. "FERNS" is in the ENABLE word list, accepted by Words With Friends and most open Scrabble apps. It scores 8 points in Scrabble and 9 points in Words With Friends.

In Scrabble, "FERNS" is worth 8 points before bonuses. In Words With Friends, it's worth 9 points. Played on a triple-word-score, the Scrabble value becomes 24.

Any of a group of some twenty thousand species of vascular plants classified in the division Pteridophyta that lack seeds and reproduce by shedding spores to initiate an alternation of generations.

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