Solutions :

3-letter words (1 point): 27

AAS; AIA; AIN; AIS; ASS; ENS; EON; ESS; EST; INN; INS; JAI; NIE; NIS; NON; OES; ONE; ONS; SAI; SAZ; SEI; SEN; SET; SIN; TES; TSK; ZAS.

4-letter words (1 point): 27

AIAS; AINE; AINS; EONS; ESNE; ESSE; ESTS; INNS; JASS; NEON; NESS; NIES; NOES; NONE; NONI; ONES; ONIE; ONST; SAIN; SENS; SENT; SESS; SETS; SIEN; SINE; SINS; TSKS.

5-letter words (2 points): 20

ASSES; ASSET; ESNES; ESSES; INSET; NEONS; NISSE; NONES; NONIS; ONSET; SAINE; SAINS; SAINT; SENSE; SENTE; SENTS; SESSA; SIENS; SIENT; SNIES.

6-letter words (3 points): 9

ASSETS; INSETS; JASSES; NESSES; NISSES; ONSETS; SAINTS; SENSES; SIENTS.

7-letter word (7 points): 1

SETNESS.

8-letter word (11 points): 1

SAINTESS.