Solutions :

3-letter words (1 point): 48

EEL; ELM; EON; ERE; ERN; GEE; GEL; GEM; INN; LEE; LEG; LEI; LEP; LEX; MEE; MEG; MEL; MIX; NIE; NIM; NIT; NIX; NOR; NOT; OPE; ORE; ORT; PEE; PER; POT; PRE; PRO; REE; REG; REI; REM; REO; REP; REX; ROE; ROT; TIE; TIN; TIX; TOE; TON; TOP; TOR.

4-letter words (1 point): 53

EMIT; EXIT; GEEP; GEIT; GERE; GERM; GERT; GLEE; GLEI; INRO; LEEP; LEER; LERE; LERP; MEER; MEIN; MERE; MERL; MINT; MINX; MIXT; NIXE; NOEL; NOPE; PEEL; PEER; PELE; PEON; PERE; PERM; PERN; PERT; POEM; PONT; PORE; PORN; PORT; PREE; PREM; PREX; REEL; REIN; REPO; RONT; ROPE; TIER; TIME; TOPE; TORE; TORN; TREE; TRON; TROP.

5-letter words (2 points): 20

ELEMI; EXERT; GERLE; MEINT; MEREL; MERER; MERLE; MIXER; NIXER; PORER; PROEM; REMIT; REMIX; REPOT; REPRO; ROPER; TIMER; TOPEE; TOPER; TROPE.

6-letter words (3 points): 7

ELMIER; PREMIX; REEMIT; REMINT; REMIXT; REPORT; RONNIE.

7-letter words (7 points): 2

PORNIER; PREMIXT.