Solutions :

3-letter words (1 point): 54

AUE; AUF; AYE; AYU; DEE; DIF; DIS; DIV; DOE; DOR; EAU; ERE; ERF; ERR; FID; FIR; FRO; FRY; FUM; FUR; IDE; IFS; IRE; ISM; MIM; MIR; ODE; ORD; ORE; ORF; RED; REE; REO; RID; RIF; RIM; ROD; ROE; RUE; RUM; RYA; RYE; SIF; SIR; SRI; UEY; UMM; URD; URE; VID; VIS; YAE; YEA; YUM.

4-letter words (1 point): 54

AERO; AUFS; DEER; DERE; DERO; DIFS; DIRE; DIVS; DOER; DORE; DORR; DREE; DREY; DRUM; ERED; ERRS; EURO; FIDO; FIRE; FREE; FRIS; FROE; FUMY; FURR; FURS; FURY; IDEE; IMMY; IRED; MIRS; MIRY; MURE; MURR; ORFS; REDO; REED; RIDE; RIFS; RIMS; RIMU; RIMY; RODE; ROED; RUED; RUER; SIDE; SIRE; SMIR; URDE; UREA; VIDE; VIRE; YEED; YERD.

5-letter words (2 points): 31

AURIS; DERRY; DOREE; DORIS; DORRS; ERODE; FIRED; FIRRY; FREED; FRYER; FUERO; FURRS; FURRY; MURED; MURID; MURRE; MURRI; MURRS; MURRY; ODEUM; ODISM; SIDER; SIRED; SIREE; SMIRR; URDEE; UREDO; URSID; VIDEO; VIRED; VIREO.

6-letter words (3 points): 5

FURRED; IMMURE; MURREE; MURREY; MURRIS.

7-letter words (7 points): 3

IMMURED; RIMFIRE; SMIRRED.