Solutions :

3-letter words (1 point): 54

AGO; AGS; ALE; ALL; ALP; ALS; ALT; APE; APO; ASP; EAS; ELL; ELS; ELT; EST; GAE; GAL; GAP; GAS; GOS; GOT; ILL; LAG; LAP; LAS; LEI; LES; LET; LIE; LOP; OPE; OPS; OSE; PAL; PAP; PAS; PEA; POA; POL; POP; PST; SAE; SAG; SAL; SAP; SEI; SEL; SET; SOG; SOT; SPA; TEL; TES; TOG.

4-letter words (1 point): 75

ALES; ALOE; ALPS; ALSO; ALTO; ALTS; APSE; APSO; EALE; EASE; EAST; ELTS; GALE; GALL; GALS; GAOL; GAPE; GAPO; GAPS; GASP; GAST; LAGS; LALL; LAPS; LASE; LAST; LEST; LETS; LIES; LOLL; LOPE; LOPS; OAST; OLLA; OPAL; PALE; PALL; PALP; PALS; PAPE; PAPS; PASE; PAST; PEAG; PEAL; PEAS; PLAP; PLIE; PLOP; POAS; POEP; POLL; POLO; POPE; POPS; SAGO; SALE; SALL; SALP; SALT; SEIL; SELL; SLAE; SLAG; SLAP; SPAE; SPAG; TEIL; TELA; TELL; TELS; TOGA; TOGS; TOSA; TOSE.

5-letter words (2 points): 43

ALTOS; EALES; EASEL; EASLE; GALES; GALOP; LAPSE; LOAST; LOLLS; OLLAS; OLLIE; OLPAE; OPALS; PALES; PALET; PALPS; PAOLO; PASTE; PEAGS; PEALS; PEASE; PLAPS; PLAST; PLIES; PLOPS; POEPS; POLLS; SALET; SALOL; SALOP; SALTO; SPALE; SPALL; SPALT; SPEAL; STEIL; STELA; STELL; TEILS; TELAE; TESLA; TOGAE; TOGAS.

6-letter words (3 points): 12

APOLLO; ELLOPS; GALLOP; GALOPS; GOSLET; OLLIES; PALEST; PALETS; PASTEL; PEOPLE; PLASTE; STELAE.

7-letter words (7 points): 5

GALLOPS; LOLLIES; PALIEST; PEOPLES; POLLIES.