Solutions :

3-letter words (1 point): 55

EEL; ERE; ERN; FIE; FIL; FIN; FIR; FOE; FOP; FOR; FOU; FUN; IFS; IOS; IRE; ISO; LEE; LEI; LIE; LIN; LIP; LOP; LOR; NIE; NIL; NIP; OIL; OLE; OPE; ORE; PEE; PER; PIE; PIN; PIR; PIS; PIU; POI; POL; PRE; PRO; REE; REI; REO; REP; RIF; RIN; RIP; ROE; SIF; SIP; SOU; UFO; ULE; UNI.

4-letter words (1 point): 51

FIER; FILE; FILO; FIRE; FIRN; FOIL; FOIN; FORE; FOUL; INRO; LEEP; LEER; LERE; LIER; LIPE; LIPO; LOIN; LOPE; LORE; LORN; OLIO; PEEL; PEER; PERE; PERI; PERN; PFUI; PIER; PILE; PIRN; PISO; POLE; PORE; PORN; PREE; PROF; REEL; REIF; REIN; REPO; RIFS; RIPE; ROIL; ROIN; ROLE; ROPE; RORE; SIPE; SOIL; SOUL; UFOS.

5-letter words (2 points): 31

ELOIN; ELOPE; FIERE; FILER; FIRER; FOLIE; FOLIO; FOREL; FOULE; LIPIN; LOIPE; LOPER; OILER; OLEIN; OLIOS; ORPIN; PILER; POILU; POLER; POLIO; PORER; PROFS; PROIN; PROLE; PRORE; REIFS; REOIL; REPIN; REPRO; RIPER; ROPER.

6-letter words (3 points): 9

ELOPER; FIORIN; FOLIOS; FOULER; FOULIE; LUNIER; POLIOS; PROLER; ROPIER.

7-letter word (7 points): 1

PROFILE.

8-letter word (11 points): 1

PROFILER.