Solutions :

3-letter words (1 point): 48

ADO; AGO; APE; APT; AUE; DAG; DAP; DID; DIE; DIP; DIS; DIT; DOG; DOT; DUE; DUP; DUX; GAD; GAP; GAU; GOA; GOD; GOT; GOV; IOS; ISO; ODA; OSE; PAD; PES; PIE; PIS; PIT; PSI; PUD; SEI; SEX; SIP; SIT; SPA; TID; TIE; TIP; TIS; TOD; TOG; UDO; UPS.

4-letter words (1 point): 39

ADIT; APES; APEX; APSE; APSO; DAGO; DAPS; DIDO; DIES; DIPS; DIPT; DUES; DUPE; DUPS; GADI; GAPE; GAPS; GAUD; GAUP; GOAD; ISIT; PADI; PESO; PIES; PISE; PISO; SEPT; SIDA; SIPE; SPAG; SPIE; SPIT; SPUD; SPUE; TIES; TIPS; TOAD; TOGA; UPDO.

5-letter words (2 points): 18

ADIEU; ADIOS; AUDIO; AUDIT; DIPSO; DUPES; DUXES; EUPAD; GADID; GADIS; GAPES; GAUPS; PADIS; PAGOD; PSEUD; SEPAD; SPADO; UPTIE.

6-letter words (3 points): 7

ADIEUX; AUDIOS; OTIOSE; PSEUDO; TIDIES; TODIES; UPTIES.

7-letter words (7 points): 2

GAUDIES; TOADIES.