Solutions :

3-letter words (1 point): 61

CHE; COR; COT; EHS; ELM; EMS; ENE; ENS; EST; ETH; HEM; HEN; HER; HES; HET; HMM; HOC; HOT; INS; ISH; ISM; LES; LET; MEL; MEM; MEN; MES; MET; MHO; NET; NIE; NIS; NTH; OCH; OHM; OHS; ORC; ORE; REH; REM; REN; RES; RET; RHO; ROC; ROT; SEI; SEL; SEN; SER; SET; SHE; SIN; TEL; TEN; TES; THE; THO; TOC; TOR; TOT.

4-letter words (1 point): 82

CHER; CORE; CORM; COTE; COTH; COTS; COTT; CREM; EINE; EISH; ELMS; ENES; ESNE; ETEN; ETHE; ETHS; HELM; HEMS; HENS; HERM; HERO; HEST; HETE; HETS; HORE; HOTE; HOTS; LEHR; LENS; LEST; LETS; MEMS; MENE; MERC; MESE; MESH; METE; METH; METS; NENE; NESH; NEST; NETE; NETS; NETT; NIES; NISH; OCHE; ORES; REHS; REMS; RENS; RESH; REST; RETE; RETS; ROCH; ROTE; ROTS; SENE; SENT; SETT; SHET; SHOT; SIEN; SINE; STEM; STEN; STOT; TEHR; TEMS; TENE; TENS; TENT; TERM; THEM; THEN; THRO; TORC; TORE; TOTE; TOTS.

5-letter words (2 points): 72

CHEST; CHORE; CHOTT; CORES; COTES; COTHS; COTTS; CREMS; CREST; EISEL; ENTER; ESTER; ESTOC; ETENS; ETHER; HELMS; HETES; HORME; HOTEL; HOTEN; INERM; INSET; LENES; LENIS; LENSE; MENES; MENSE; MENSH; MERCH; MESNE; MESTO; METES; METHO; METHS; NEIST; NENES; NETES; OCHER; OCHES; OCHRE; OTHER; OTTER; RESET; RESIN; RESTO; RETES; ROTES; ROTTE; SEINE; SENTE; SHORE; SHOTE; SHOTT; SIENT; SIETH; STEIN; STENT; STORE; STORM; TEMSE; TENES; TENSE; TENTH; THENS; THERM; THESE; THETE; TORCH; TORES; TOTEM; TOTER; TOTES.

6-letter words (3 points): 32

CHENET; CHORES; CHOTTS; CORMEL; COTTER; ENMESH; HORMES; HOTTER; INMESH; NESHER; NESTER; NESTOR; NETHER; OCHRES; ORCHEL; RENEST; RENIES; RESENT; RESHOT; ROCHES; ROCHET; ROTTEN; ROTTES; SEINER; SHOTTE; TENSER; TENTHS; THETES; THRENE; TOCHER; TOTEMS; TOTHER.

7-letter words (7 points): 10

CHENETS; CREMSIN; INSHORE; LENIENT; ROCHETS; ROTTENS; SHOTTEN; STENTOR; THRENES; TORCHES.

8-letter word (11 points): 1

LENIENTS.