Solutions :

3-letter words (1 point): 54

AAL; AAS; ADS; AIA; AID; AIS; AUA; DAS; DIS; DUO; IDS; LAR; LAT; LOO; LOR; LOT; LOU; NAT; NUR; OAR; OAT; OOR; OOT; ORA; OUD; OUT; RAI; RAN; RAT; ROO; ROT; RUN; SAD; SAI; SAT; SAU; SAV; TAD; TAI; TAN; TAO; TAR; TAS; TAU; TAV; TOO; TOR; URN; UTA; UTS; UVA; VAS; VAT; VAU.

4-letter words (1 point): 73

AIAS; AIDS; AURA; DAIS; DATA; DATO; DAUR; DIAL; DISA; LAID; LARN; LATS; LATU; LOAD; LOAN; LOOR; LOOT; LORN; LOTA; LOTO; LOTS; LOUD; LOUT; NATS; NURL; OAST; OATS; OOTS; ORAL; OUTS; RAIA; RAID; RAIS; RATA; RATO; RATS; RATU; RAUN; ROAD; ROAN; ROOT; ROTA; ROTO; ROTS; ROUL; ROUT; SADI; SAID; SIAL; SIDA; STAR; STOA; STUD; TAAL; TADS; TAIS; TARN; TARO; TAVS; TOAD; TOLA; TOLU; TOOL; TORA; TORN; ULAN; UNAI; URAO; UTAS; UVAS; VAST; VATS; VATU.

5-letter words (2 points): 37

ALOUD; AURAL; DATAL; LAIDS; LOADS; LOAST; LOOTS; LORAN; LOTAS; LOUTS; NAIAD; RAIAS; RAIDS; RATAS; RATOO; ROADS; ROAST; ROOTS; ROTAL; ROTAN; ROTAS; ROUTS; SATAI; SAUNA; STAID; STARN; STAUN; STOAI; STOOL; STOOR; TOADS; TOLAN; TOLAR; TORAN; TSADI; UNAIS; URNAL.

6-letter words (3 points): 4

DISTAL; NAIADS; STADIA; UNROOT.

7-letter words (7 points): 4

DIURNAL; OUTSAID; STADIAL; UNROOTS.

8-letter word (11 points): 1

LOADSTAR.