Solutions :

3-letter words (1 point): 34

AFT; ARS; ART; ATE; ATT; EFT; ETA; FAR; FAT; FEN; FET; INN; ITA; ITS; LIN; LIT; LUZ; NEF; NET; NIL; NIT; RAT; TAR; TAT; TEF; TEN; TIL; TIN; TIT; TUI; UTS; YIN; ZIN; ZIT.

4-letter words (1 point): 37

ARTI; ARTS; ETAT; FARS; FART; FATE; FENI; FETA; FETT; INLY; IZAR; LINE; LINN; LITE; LITS; LITU; LUIT; LUTZ; NETT; NITE; NITS; RAFT; RATE; TARS; TART; TATE; TINE; TITE; TITS; TRAT; TZAR; YITE; YUTZ; ZATI; ZINE; ZITE; ZITS.

5-letter words (2 points): 9

AZINE; ENLIT; FARTS; FETTA; IZARS; LINEN; TARTS; TRATT; TZARS.

6-letter words (3 points): 9

ARTILY; FATTEN; LINNET; LUITEN; LUTITE; RATINE; RATTEN; STRAFE; STRATI.

7-letter words (7 points): 6

FATTILY; FENITAR; NITRATE; RATTILY; TARTILY; TARTINE.

8-letter word (11 points): 1

FENITARS.