Solutions :

3-letter words (1 point): 60

EGO; ELT; EMO; ERG; ERN; GEL; GEM; GEN; GET; GHI; GOO; GOR; HEM; HEN; HER; HET; HEX; HOG; HOM; HON; HOO; LEG; LET; LEX; MEG; MEL; MEN; MET; MHO; MOG; MON; MOO; MOR; NEG; NET; NOH; NOM; NOO; NOR; OHM; OHO; OOH; OOM; OON; OOR; ORE; ORT; REG; REH; REM; REN; RET; REX; RIG; ROM; ROO; TEG; TEL; TEN; TEX.

4-letter words (1 point): 51

ERGO; GELT; GENT; GERM; GERT; GIRO; GOON; GOOR; GORI; GORM; GREN; GREX; HENT; HERM; HERN; HERO; HOGH; HOME; HOMO; HOON; HORE; HORI; HORN; LEHR; LENT; MELT; MENT; MOON; MOOR; MORE; MORN; MORT; NEMN; NEXT; NOME; NORM; OGRE; OMEN; OMER; OONT; REGO; RENT; RONT; ROOM; ROON; TEHR; TENT; TERM; TERN; TRET; TRON.

5-letter words (2 points): 17

GENRO; GOMER; GROOM; HERON; HOGEN; HOMER; HORME; LEMON; METRO; MOREL; MORNE; NEGRO; NOMEN; ORMER; ROGER; RONNE; TENNO.

6-letter words (3 points): 9

GORHEN; GROMET; HORNET; MONTRE; MORGEN; RONNEL; ROOMER; TERMOR; TREMOR.

7-letter words (7 points): 4

GROOMER; LEGROOM; MOORHEN; REGROOM.