FLORSWU
Make words with U
Never: plural or third-person -S
FLOUR FLUFF FLUOR FOUL FOUR FULL FURL FUROR FURROW FUSS LUFF LULL LULU LUSUS OURS RUFF SLUFF SLUR SORROWFUL SOUL SOULFUL SOUR SURF SUSS SUSURROUS SUSURRUS USUROUS WUSS
Pangrams: SORROWFUL
score: 99