Solutions :

3-letter words (1 point): 78

ACE; AGE; AHS; APE; APO; ATE; CAP; CEE; COP; COS; EAT; ECO; EEN; EHS; ENE; ENG; EST; ETA; ETH; GAE; GAM; GAT; GEE; GEM; GEN; GEO; GET; HAE; HAG; HAM; HAT; HEM; HEN; HEP; HES; HET; HOA; HOC; HOE; HOP; HOS; MAE; MAG; MAT; MEE; MEG; MEN; MET; NEE; NEG; NET; OCA; OES; OHS; OPE; OSE; PAC; PEA; PEH; PES; POA; POH; POS; SEA; SHA; SHE; SOC; SOH; SOP; TAE; TAG; TAM; TEA; TEE; TEG; TEN; THE; THO.

4-letter words (1 point): 91

ACNE; AGEE; AGEN; AHEM; AMEN; APES; APOS; CAPE; CAPO; COPE; COSE; COSH; COST; EATH; EATS; ECOS; EGMA; EPOS; ETHE; ETHS; GAEN; GAME; GATE; GATH; GATS; GEAT; GENE; GEOS; GETA; GETS; HAEM; HAEN; HAET; HAME; HATE; HATS; HEAP; HEAT; HEST; HETS; HOES; HOPE; HOSE; HOST; MAGE; MATE; MATH; MATS; MEAT; MEGA; MENE; MENG; META; METH; METS; NEAP; NEAT; NEEM; NEMA; NETS; OPES; PACE; PACO; PEHS; PESO; PEST; POEM; POET; POSE; POSH; POST; SHAG; SHAM; SHAT; SHEA; SHET; SHOE; SHOP; SOAP; SOCA; STAG; STEM; STEN; TAME; TEAM; TEEN; TENE; THAE; THEE; THEM; THEN.

5-letter words (2 points): 46

AGENE; AHEAP; AMENE; CAPES; CAPOS; COPES; COSTA; COSTE; EATHE; ENEMA; ETAGE; ETHOS; GATHS; GEATS; GENET; HAETS; HEATS; HENCE; HENGE; HOPES; HOSTA; MAHOE; MATHS; MEATH; MEATS; MENGE; METHO; METHS; NEATH; NEATS; PACOS; PEACE; POETS; SHAME; SHEEN; SHEET; SHOPE; STAGE; STEAM; STEEN; TEENE; TENGE; THECA; THEGN; THEMA; THOSE.

6-letter words (3 points): 15

COSTAE; EGENCE; EOCENE; ETHENE; GENETS; MAGNET; MAHOES; MEATHE; MEATHS; METAGE; METHOS; NEGATE; STAMEN; THECAE; THENCE.

7-letter words (7 points): 7

HOSTAGE; MAGNETS; MEATHES; POSTAGE; POSTEEN; SHOEPAC; STENGAH.

8-letter word (11 points): 1

POSHTEEN.