STOAT

Yes. "STOAT" is in the ENABLE word list, accepted by Words With Friends and most open Scrabble apps. It scores 5 points in Scrabble and 5 points in Words With Friends.

In Scrabble, "STOAT" is worth 5 points before bonuses. In Words With Friends, it's worth 5 points. Played on a triple-word-score, the Scrabble value becomes 15.

Mustela erminea, the ermine or short-tailed weasel, a mustelid native to Eurasia and North America, distinguished from the least weasel by its larger size and longer tail with a prominent black tip.

1 anagram can be formed using the same letters as STOAT: TOAST.