Solutions :

3-letter words (1 point): 47

DIG; DIS; DIV; DUI; DUN; ELS; EMO; EVO; GID; GIO; GIS; LES; LEV; LID; LIG; LIS; MEL; MES; MOE; MOI; MOL; NUR; NUS; NYS; OES; OIL; RID; RIG; RUD; RUN; SEL; SIR; SIX; SUD; SUI; SUN; SUR; SYN; URD; USE; VID; VIG; VIS; VOE; VOL; XIS; YUS.

4-letter words (1 point): 44

DIOL; DIRL; DIVE; DIVS; EVIL; GIRD; GIRL; GIVE; GLID; GLOM; GRID; GRIS; ISLE; LEVO; LIVE; LOID; LOIR; LOME; LOVE; MELS; MOES; MOIL; MOVE; NURD; NURL; OLID; OVEL; RISE; RIVE; RIVO; RUND; RUSE; SILE; SILO; SUID; SURD; SYND; UNDY; URDY; VIOL; VIRL; VISE; VOES; VOID.

5-letter words (2 points): 20

DIVES; DRIVE; DRUSE; DRUSY; GIVES; GLOVE; GRISE; GRISY; LEVIS; LISLE; LIVES; LOMES; LOVES; MOVES; NURDY; OLIVE; OVELS; RIVEL; RIVES; VIRUS.

6-letter words (3 points): 7

DRIVEL; DRIVES; GLOVES; OLIVES; RIVELS; SUNDRI; VISILE.

7-letter word (7 points): 1

DRIVELS.