Solutions :

3-letter words (1 point): 40

AFT; ANE; ANN; ARE; ARF; ART; DAE; EAN; EAR; EFT; ERA; ERF; ERN; ERR; FAD; FAE; FAR; FEN; FER; FET; FRA; JAR; JET; LAR; NAE; NAN; NEF; NET; RAD; RAJ; RAN; RED; REF; REN; RET; TEA; TED; TEF; TEN; TRY.

4-letter words (1 point): 47

AERY; AREA; ARET; ARNA; DAFT; DARE; DARN; DART; DEAF; DEAR; DERN; EARN; ERNE; FADE; FARE; FART; FEAL; FEAR; FERN; FRAE; FRET; JADE; LAER; LANE; LARE; LARN; LYRE; LYTE; NANE; NARE; NEAL; NEAR; RADE; RAFT; READ; REAL; REAN; REAR; REFT; TEAD; TEAL; TEAR; TERF; TERN; TRAD; TREF; TYRE.

5-letter words (2 points): 25

AFEAR; AFTER; AREAL; ARENA; ARRET; DARRE; DEARE; DEARN; ERRED; FADER; FAERY; FERAL; FERRY; FRENA; LYTED; NARRE; NERAL; RENAL; TERNE; TERRA; TERRY; TRADE; TREAD; TREFA; TYRED.

6-letter words (3 points): 13

DAFTER; DEAFEN; DEAFER; DERNLY; FARRED; FERRET; JADERY; JARRED; LANNER; TERNAL; TERRAE; TERRET; TRADER.

7-letter words (7 points): 3

DEARNLY; FERRETY; TERRANE.