Solutions :

3-letter words (1 point): 26

ELL; ELT; ETH; HEN; HET; HIE; HIT; HUT; ILL; IRE; LEI; LIE; LIN; LIT; NET; NIE; NIL; NTH; REI; RIT; TEN; THE; TIE; TIL; TUT; UTE.

4-letter words (1 point): 31

EILD; ELHI; HEIL; HENT; HILL; HILT; HIRE; LEIR; LIEN; LIER; LINE; LINT; LIRE; LITH; LITU; NETT; NILL; RIEL; RILE; RILL; RITT; TEIL; THEN; THIR; TIER; TILE; TILL; TIRE; TIRL; VLEI; VRIL.

5-letter words (2 points): 11

ENLIT; ETTLE; ILLER; ILLTH; LITHE; RELIT; THEIN; THILL; THIRL; TILER; UTILE.

6-letter words (3 points): 4

INLIER; LITTEN; NETTIE; NETTLE.

7-letter words (7 points): 2

NETTIER; NETTLER.

8-letter word (11 points): 1

NETTLIER.