KAON

Yes. "KAON" 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, "KAON" 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 four unstable subatomic particles, mesons, they are a combination of a strange quark or antiquark and either an up or down quark or antiquark

1 anagram can be formed using the same letters as KAON: KOAN.