Solutions :

Boggle S F L N M T E E G P I I R J N U

3-letter words (1 point): 38

EEL; EEN; EFS; EFT; ELF; ELT; ENE; FEE; FEN; FET; ITS; JIN; LEE; LEI; LEP; LET; NEE; NEF; NEP; NET; NIE; NIP; NIT; PEE; PEN; PET; PIE; PIN; PIT; PIU; TEE; TEF; TEL; TEN; TIE; TIN; TIP; UNI.

4-letter words (1 point): 38

EFTS; ELFS; ELTS; FEEL; FEEN; FELT; FETS; FLEE; LEEP; LEET; LEFT; LEPT; LETS; NEEP; NEFS; NETS; NIEF; NITE; NITS; PEEL; PEEN; PEIN; PELE; PELF; PELT; PENE; PETS; PIET; PITS; STEN; STEP; STIE; TEEL; TEEN; TEFS; TELE; TENE; UNIT.

5-letter words (2 points): 17

FELTS; FLEET; LEETS; LEFTS; NEPIT; NIEFS; PELFS; PELTS; PIETS; STEEL; STEEN; STEIN; STELE; STIPE; UNITE; UNITS; UNPEN.

6-letter words (3 points): 5

FLEETS; LEFTIE; LEPTIN; NEPITS; STIPEL.