Solutions :

3-letter words (1 point): 48

AFT; AHI; AHS; AIN; AIS; AIT; ANI; ANN; ASH; ASS; BEE; BES; EAS; FAE; FAH; FAS; FIE; FIN; FIT; HAE; HAN; HAS; HIE; HIN; HIS; HIT; INN; INS; ISH; ITS; NAH; NAS; NIE; NIS; NIT; SAE; SAI; SAN; SEA; SEE; SEI; SHA; SIF; SIN; SIT; TIE; TIN; TIS.

4-letter words (1 point): 44

AHIS; AINS; AITS; ANIS; ANNS; ANSA; BEES; BEIN; EASE; EINA; EISH; FAIN; FASH; FINS; FISH; FITS; HAES; HAFT; HAIN; HASH; HIES; HINS; HINT; HISH; HISN; HITS; INNS; ISNA; NIES; NISH; NITS; SAFT; SAIN; SANS; SEIF; SHAN; SIFT; SINH; SINS; SITS; SNIT; STIE; TIES; TINS.

5-letter words (2 points): 23

AHINT; ANISE; ANSAE; BESIT; FAINS; FAINT; HAFTS; HAINS; HAINT; HANSA; HANSE; HINTS; SAINS; SAINT; SANSA; SHANS; SIFTS; SINHS; SNASH; SNIES; SNIFT; SNITS; STIES.

6-letter words (3 points): 8

BESITS; FAINTS; HAINTS; SAINTS; SANIES; SANNIE; SANSEI; SNIFTS.

7-letter words (7 points): 2

BESAINT; SANNIES.

8-letter words (11 points): 2

BESAINTS; SHANNIES.