Solutions :

3-letter words (1 point): 47

APO; APT; ASS; ISO; LUR; LUV; OOP; OOR; OOS; OOT; OPS; OPT; ORT; OUP; OUR; OUS; PAS; PAX; POA; POO; POS; POT; POX; PRO; PSI; PUL; PUR; PUS; ROO; ROT; SAP; SAX; SIS; SOP; SOS; SOU; SOX; SPA; SUP; SUR; TOO; TOP; TOR; UPO; UPS; URP; VIS.

4-letter words (1 point): 47

APOS; APSO; ISOS; LUVS; OOPS; OPUS; OSSA; OUPA; OUPS; PASS; POAS; POOR; POOS; POOT; PORT; POSS; POUR; PROA; PROO; PSIS; PULS; PURL; PUSS; ROOP; ROOS; RURP; SAPS; SISS; SLUR; SOAP; SOOP; SOOT; SOPS; SOSS; SOUL; SOUP; SOUR; SOUS; SPAS; SPOT; SPUR; TOPO; TOPS; TROP; UPAS; URPS; VROT.

5-letter words (2 points): 26

APORT; APSIS; APSOS; OUPAS; POORT; PROAS; PSOAS; PURLS; ROOPS; ROOSA; RURPS; SAPOR; SLURP; SOAPS; SOOPS; SOPOR; SOULS; SOUPS; SPOOR; SPOOT; SPORT; SPURT; TOPOS; TORUS; TROOP; TRUSS.

6-letter words (3 points): 3

SAPOUR; SISSOO; TROOPS.

7-letter word (7 points): 1

SURPASS.