Solutions :

3-letter words (1 point): 45

AIM; AIR; AIS; AIT; ALT; AMI; CIT; HAM; HAT; ION; ISM; ITA; LAH; LAM; LAT; LOT; LOU; MAL; MAT; MIC; MIR; MIS; MOI; MOL; MON; MOT; MOU; NOM; NOT; NTH; OMS; RIA; RIM; RIT; SIM; SIR; SIT; SMA; SRI; TAI; TAM; TIC; TIS; TOM; TON.

4-letter words (1 point): 61

AIMS; AIRS; ALTO; AMIR; AMIS; ATOM; CION; CITO; CRIM; CRIS; CRIT; CUIT; HAIR; HALO; HALT; HAMS; IOTA; IRIS; LAIR; LAMS; LATH; LATI; LOIR; LOMA; LOTA; LOTH; LOTI; LOUN; MAIR; MALT; MATH; MIRI; MIRS; MOIT; MOLA; MOLT; MOTH; MOTI; NOIR; NOMA; NOMS; NOTA; OMIT; OTIC; RIAL; RIMA; RIMS; RIOT; SIAL; SIMA; SIMI; SIRI; SITH; SMIR; SMIT; TAIS; TAMS; TOLA; TOMS; TOUN; UNTO.

5-letter words (2 points): 31

AMIRS; AMRIT; ATOMS; CITAL; CRIMS; CRITH; HAIRS; HALON; LAIRS; LAITH; LOIRS; LOTAH; LOTIC; MAIRS; MATLO; MITIS; MONTH; MOTIS; MOUNT; NOIRS; NOMIC; NOTAL; ONTIC; SMALT; SMITH; SMOLT; TALON; TAMIS; THAIM; TIMON; TOMIA.

6-letter words (3 points): 11

AMOUNT; ATOMIC; CITOLA; MALOTI; RIALTO; SIALON; SMALTI; SMALTO; SMRITI; THAIRM; TOMIAL.

7-letter words (7 points): 3

ISMATIC; SIMATIC; THAIRMS.