Solutions :

3-letter words (1 point): 58

AFT; ALE; ANE; ANI; ANN; ATE; DEE; DEI; DEL; DEN; DIE; DOE; DON; EAN; EAT; EEL; EEN; EFT; ENE; EON; ETA; FAE; FAN; FAT; FEE; FET; IDE; INN; ION; IRE; LAT; LEA; LED; LEE; LEI; LET; LID; LIE; NAE; NAT; NED; NEE; NIE; NOD; ODE; ONE; RED; REE; REI; REN; RID; TAE; TAN; TEA; TEE; TEF; TEL; ZIN.

4-letter words (1 point): 91

AEON; ALEE; ALEF; DEAF; DEAL; DEAN; DEEN; DEER; DEET; DEIL; DELE; DELI; DENE; DENI; DIEL; DIRE; DIRL; DOEN; DONA; DONE; EALE; EIDE; EINA; EINE; ELAN; FANE; FANO; FATE; FEAL; FEAT; FEED; FEEL; FEEN; FEER; FETA; IDEA; IDEE; ILEA; IRED; LAER; LANE; LATE; LEAF; LEAN; LEAT; LEED; LEER; LEET; LEFT; LEIR; LENO; LIDO; LIED; LIEN; LIER; LIRE; NAZI; NEAL; NEAT; NEED; NIED; NINE; NODE; NODI; ODEA; ONER; ONIE; REAL; REAN; REDE; REDO; REED; REEF; REEL; REEN; RIDE; RIEL; RILE; TAED; TAEL; TALE; TALI; TANE; TEAL; TEED; TEEL; TEEN; TEER; TELA; TELE; ZINE.

5-letter words (2 points): 35

AERIE; ALEFT; ALIEN; ANELE; ANODE; AZINE; DIENE; DONEE; DONER; EANED; EDILE; EERIE; EIDER; ELATE; ELIDE; ENATE; FELID; FETAL; IDEAL; INNED; INNER; NALED; NEAFE; NEELE; REATE; REDON; RELET; RELIE; RENAL; RENIN; RILED; TALER; TEAED; TEENE; TELAE.

6-letter words (3 points): 28

AEDILE; AERIED; AZIONE; DEALER; DEANER; DELATE; DILATE; DONATE; FAERIE; FEALED; FEERIE; IDEATE; INNATE; LATEEN; LAZIED; LEANED; LEANER; LIEDER; NEALED; REDEAL; REDONE; RELATE; RELIDE; RELIED; RENIED; TANNIE; TEENED; ZANIED.

7-letter words (7 points): 5

ALIENED; ALIENEE; ALIENER; ATELIER; DEERLET.