Solutions :

3-letter words (1 point): 54

ADO; ADS; AHS; ARD; AYU; COD; CON; COS; DAH; DAY; DIV; DOC; DON; DOS; DSO; DUD; DUH; DUI; DUO; HAD; HAY; HUI; HUT; IDS; NOD; NOS; ODA; ODS; ONS; OUD; OUR; OUS; RAD; RAH; RAY; RUD; SHA; SHY; SOC; SOD; SON; SOU; SUD; SUR; THY; TUI; UDO; UDS; URD; VID; YAD; YAH; YAR; YUS.

4-letter words (1 point): 58

ADOS; ARDS; AYUS; BHUT; CODA; CODS; COND; CONS; COSH; COUR; DAHS; DAUD; DAUR; DIVS; DOCS; DONS; DOSH; DOUR; DRAY; DUAD; DUAR; DUDS; DUOS; DURA; DUSH; DUTY; HADS; HARD; HAUD; HUSO; NODS; NOSH; NOUS; ODAH; OUDS; RADS; RAHS; RUDS; RUSH; SHAD; SHAY; SHUT; SNOD; SODA; SOUR; SURA; SURD; THAR; THUD; THUS; UDON; UDOS; URDS; VIDS; YADS; YAHS; YARD; YAUD.

5-letter words (2 points): 23

COURD; DAUDS; DOUAR; DOURA; DUADS; HARDS; HAUDS; HUDUD; HURDS; NODUS; ODAHS; RADON; RAHUI; RUSHY; SCOUR; SHARD; SHURA; SURAH; THUDS; THUYA; UDONS; YARDS; YAUDS.

6-letter words (3 points): 3

DOURAH; HUDUDS; RADONS.

7-letter word (7 points): 1

DOURAHS.