Solutions :

3-letter words (1 point): 44

AIR; AIS; ANI; ANT; AUE; AUF; CAN; CUE; CUT; ERF; ERS; EVE; FAN; FIE; FIR; FUN; IFS; IRE; NIE; NIT; NUT; REE; REI; RET; REV; RIA; RIF; SIF; SIR; SRI; TEE; TET; TIE; TIN; TIT; TUI; TUN; UNI; UTE; VEE; VET; VIA; VIE; VIS.

4-letter words (1 point): 52

AIRS; ANTE; ANTI; AUFS; AUNT; CANT; CAUF; CUIF; CUIT; CUNT; CUTE; EINA; ETNA; ETUI; EVER; EVET; FAIR; FAUN; FAUT; FIER; FIRE; FIRS; FIVE; FREE; FRET; FRIS; NAIF; NITE; REIF; REIN; REIS; RETE; RIFS; RIVE; SIRE; TEER; TERF; TETE; TIER; TINT; TITE; TUAN; TUFA; TUIS; TUNA; UNAI; UNIT; VEER; VEIN; VERS; VIER; VIRE.

5-letter words (2 points): 39

ACUTE; AFIRE; AIVER; CUIFS; CUTIE; CUTIN; ETTIN; ETUIS; FAIRS; FIERS; FIVER; FREET; FREIT; INCUT; NAIFS; NAIVE; NIEVE; NITER; REIFS; REIVE; RETIE; REVET; RIANT; RIEVE; RIVET; SIEVE; SIREE; SIVER; TEERS; TERFS; TIERS; TITER; TUINA; UNAIS; UNITE; UNTIE; UTTER; VEERS; VIERS.

6-letter words (3 points): 18

AFREET; AIVERS; AUNTIE; CANIER; CUITER; CUTTER; FIAUNT; FIVERS; NAIVER; NITERS; NUTTER; RETINA; RETINT; SIFREI; TITERS; TUNIER; UNITER; UTTERS.

7-letter words (7 points): 9

CANTIER; CUITERS; CUTTERS; CUTTIER; NAIVETE; NUTTERS; NUTTIER; REUNITE; UNITERS.