PAVSROU
Make words with U
Never:
* plural -S
* third-person -S
Missed: SAVOUR, USUROUS, PAPPUS, SUSURRUS, SUSSUROUS
AURA AURORA AUROUS OPUS POROUS POUR PUPA PUPU PURR PUSS SAPOROUS SAVOROUS SOUP SOUR SOURPUSS SOURSOP SPUR SURPASS UPROAR UPSOAR USURP VAPOROUS