Solutions :

3-letter words (1 point): 39

ASS; DEY; EAS; EDS; EEL; ELT; EMS; ESS; EST; LEE; LES; LET; MAE; MAS; MED; MES; MET; RYE; SAE; SAM; SEA; SED; SEE; SEL; SET; SEY; SMA; STY; TEA; TED; TEE; TEL; TES; TET; TRY; TYE; YEA; YES; YET.

4-letter words (1 point): 50

DEMY; ELTS; ESES; ESSE; LEES; LEET; LESS; LEST; LETS; MAES; MASE; MASS; MEDS; MESA; MESE; MESS; METE; METS; RYES; SAME; SEAM; SEAS; SEEL; SELE; SESE; SETS; SETT; STED; STEM; STET; STEY; STYE; TEAM; TEAS; TEDS; TEEL; TEES; TELE; TELT; TEMS; TEST; TETE; TETS; TRYE; TYED; TYES; YEAS; YEDE; YEST; YETT.

5-letter words (2 points): 37

AEDES; ASSET; DESSE; EDEMA; ETTLE; ETYMA; LEESE; LEETS; LESES; MASED; MASES; MASSE; MESEL; METES; SAMES; SAMEY; SEAMS; SEAMY; SEDES; SETTS; STEAM; STEDE; STEDS; STEEL; STELE; STEMS; STYED; STYES; STYME; TEAMS; TELES; TESTE; TESTY; TETES; TRYMA; YEDES; YETTS.

6-letter words (3 points): 24

DETEST; EASSEL; EDEMAS; ETTLES; LEESES; LESTED; LETTED; MASSED; MESSED; MESTEE; METTLE; MYRTLE; SESTET; SETTEE; SETTLE; STEAMS; STEAMY; STEDES; STYMED; STYMES; TESTED; TESTEE; TESTES; YESSED.

7-letter words (7 points): 7

METTLES; MYRTLES; SESTETT; SETTEES; SETTLES; STETTED; TELESES.