Solutions :

3-letter words (1 point): 54

ABO; ABS; AIL; AIN; AIT; ANI; ANT; ASS; ATT; BAN; BAS; BAT; BEL; BES; BIO; BOA; BOI; ELS; ESS; EST; ITA; ITS; LEI; LES; LEU; LIB; LIE; NAB; NAS; NAT; NIT; OAT; OBA; OBE; OBI; OBS; OIL; SAB; SAI; SAN; SAT; SEL; SUE; SUS; TAB; TAI; TAN; TAO; TAS; TIN; TUT; USE; UTA; UTS.

4-letter words (1 point): 59

ABLE; AILS; AITS; AITU; ANTI; ANTS; BAIL; BAIT; BANI; BANT; BASE; BASS; BAST; BATS; BATT; BELS; BEST; BIAS; BILE; BOAS; BOAT; BOIL; ELSE; ITAS; LESS; LEST; LIAS; LIBS; NABE; NABS; NAIL; NAOI; NATS; NITS; OAST; OATS; OBAS; OBES; OBIA; OILS; OINT; SABE; SAIL; SAIN; SANT; SATI; SELE; SELS; STAB; SUES; TABI; TABS; TAIL; TAIN; TASS; TINT; TUTS; USES; UTAS.

5-letter words (2 points): 43

ABELE; ABLES; ABOIL; AITUS; BAILS; BAITS; BANTS; BANTU; BASES; BASSE; BASTI; BATTS; BATTU; BELIE; BESAT; BESTI; BILES; BLESS; BLEST; BOAST; BOATS; BOILS; ILEUS; LESBO; NABES; NAILS; OASES; OBELI; OBIAS; OINTS; SABES; SABLE; SAINT; SATIN; STAIN; STINT; SUTTA; TABES; TABLE; TAILS; TAINT; TASSE; TINTS.

6-letter words (3 points): 22

ABELES; ABLEST; BANTUS; BATTUE; BIASES; INTUSE; LIASES; LIBANT; OBELIA; OBTAIN; OBTUSE; SABLES; STABLE; SUTTAS; TABLES; TAINTS; TASSEL; TUSSLE; TUTSAN; TUTSES; USABLE; UTASES.

7-letter words (7 points): 10

BATTUES; BESAINT; BESTAIN; INTUSES; LESBIAN; OBELIAS; SESTINA; STABILE; STABLES; SUSTAIN.

8-letter words (11 points): 2

OBTUSEST; STABILES.