Solutions :

3-letter words (1 point): 40

ACT; ARM; ARS; ART; ASS; ATE; ATT; CAT; EAS; EAT; ELT; ESS; EST; ETA; LEA; LES; LET; MAM; MAR; MAT; RAM; RAT; SAC; SAE; SAT; SEA; SEL; SET; SMA; TAE; TAM; TAR; TAS; TAV; TEA; TEL; TES; TET; VAR; VAT.

4-letter words (1 point): 56

ACTA; ACTS; AESC; ARMS; ARSE; ARTS; ATES; ATMA; CASE; CAST; CATE; CATS; EAST; EATS; ELTS; ESTS; ETAS; LEAS; LEAT; LESS; LEST; LETS; MAMS; MARM; MARS; MART; MATS; MATT; RAMS; RATS; SACS; SASS; SATE; SCAT; SEAS; SEAT; SETA; SETT; STAR; STET; TACT; TAEL; TAES; TAMS; TARS; TART; TASS; TEAS; TEAT; TELT; TEST; TETS; TRAM; TRAT; VARS; VATS.

5-letter words (2 points): 33

ARTEL; ASSET; ATTAR; CASTE; CASTS; CATES; EASTS; LEAST; LEATS; LESTS; MARMS; MARSE; MARTS; MATTE; MATTS; SATES; SCATS; SCATT; SETTS; SMARM; SMART; STARS; START; TACTS; TARTS; TASSE; TEATS; TESTA; TESTS; TETRA; TRAMS; TRATS; TRATT.

6-letter words (3 points): 17

ASTART; ATTARS; ATTEST; CASTLE; CATTLE; LEASTS; MARTEL; MATTES; RATTLE; SASTRA; SCATTS; SMARTS; STARTS; TARSEL; TASSEL; TASSET; TRATTS.

7-letter words (7 points): 7

ARTLESS; ATTESTS; MARTLET; RATTLES; STARTLE; TARTEST; TARTLET.

8-letter words (11 points): 5

MARTLETS; SMARTASS; SMARTEST; STARTLES; TARTLETS.