Solutions :

3-letter words (1 point): 69

ABO; ACT; AHA; AHI; AIA; ATE; AYE; BAC; BAG; BAH; BOH; BOS; BOT; CAB; CAG; COB; COL; COS; COT; EAT; ELS; ELT; ETA; ETH; GAB; HAE; HAG; HAT; HAY; HIE; HOB; HOC; HOE; HOS; HOT; HYE; LET; LEY; LOB; LOS; LOT; OBA; OBI; OCA; OLE; REO; RET; RYA; RYE; SOB; SOC; SOH; SOL; SOT; TAE; TAI; TAY; TEL; THE; THO; THY; TOC; TOE; TOT; TRY; TYE; YAE; YAH; YET.

4-letter words (1 point): 68

ABOS; ACTS; ATOC; AYRE; BAHT; BHAT; BOET; BOLE; BOLT; BOTA; BOTH; BOTS; COLE; COLS; COLT; COST; COTE; COTH; COTS; EATH; ELTS; ETHE; HATE; HEAT; HOER; HOLE; HOLS; HOLT; HOST; HOTE; HOTS; HYTE; LOBI; LOCA; LOST; LOTA; LOTE; LOTH; LOTS; OBIA; OHIA; REOS; SLEY; SLOB; SLOE; SLOT; SOBA; SOCA; SOLE; SOTH; STOB; STOT; TAHA; TELS; TELT; THAE; TOEY; TOLE; TOLT; TOST; TOTE; TOTS; TREY; TRYE; TYER; TYRE; YATE; YELT.

5-letter words (2 points): 26

BOHEA; BOLTS; BOTEL; BOTHY; COBIA; COHAB; COLEY; COLTS; EATER; ETHOS; HATER; HAYER; HOLEY; HOLTS; HOTEL; LETHE; LOTAH; SLOTH; SOLER; STOLE; TELOS; THOLE; TOLTS; TOTER; YELTS; YTOST.

6-letter words (3 points): 9

BOLTER; BOTELS; BOTHIE; COLTER; EATERY; HEATER; HOTELS; OSTLER; TOLTER.

7-letter words (7 points): 2

HAGBOLT; HOSTLER.

8-letter word (11 points): 1

HAGBOLTS.