PUS

Yes. "PUS" is in the ENABLE word list, accepted by Words With Friends and most open Scrabble apps. It scores 5 points in Scrabble and 7 points in Words With Friends.

In Scrabble, "PUS" is worth 5 points before bonuses. In Words With Friends, it's worth 7 points. Played on a triple-word-score, the Scrabble value becomes 15.

A whitish-yellow or yellow substance composed primarily of dead white blood cells and dead pyogenic bacteria; normally found in regions of bacterial infection.

2 anagrams can be formed using the same letters as PUS: SUP, UPS.