Solutions :

3-letter words (1 point): 30

AFT; ALS; ALT; BAL; BAM; BES; EFS; EFT; ESS; EST; FAB; FES; FIB; FIE; IFS; INS; ISM; LAB; LAM; MAL; MOA; MOL; NIS; OAF; OLM; OMS; SEI; SIN; SIS; SMA.

4-letter words (1 point): 30

ALMS; ALTS; BAFT; BALM; BALS; BAMS; BEST; EFTS; ESTS; FESS; FEST; ISMS; LAMB; LAMS; LOAF; LOAM; LOMA; MABE; MALS; MALT; MOLA; MOLS; MOLT; OAFS; OLMS; SEIF; SINS; SIST; SLAB; SLAM.

5-letter words (2 points): 19

ABIES; BAFTS; BALMS; BESTS; FESTS; FIEST; ISSEI; LOAFS; LOAMS; MABES; MALTS; MOLTS; NISEI; NISSE; SEIFS; SISTS; SLAMS; SMALT; SMOLT.

6-letter words (3 points): 3

LAMBIE; SMALTS; SMOLTS.

7-letter word (7 points): 1

LAMBIES.

8-letter word (11 points): 1

LAMBIEST.