Solutions :

3-letter words (1 point): 64

ADO; ADZ; AND; ANE; ATE; AVO; AZO; DAE; DAN; DEE; DEN; DOE; DOH; DOL; DZO; EAN; EAT; EEK; EEN; END; ERK; ERR; ETA; HAO; HEN; HER; HET; HOA; HOD; HOE; KEA; KET; LAH; LAV; LOD; NAE; NAT; NED; NEE; NET; ODA; ODE; OVA; PHO; PRE; REE; REH; REO; RET; RHO; TAD; TAE; TAN; TEA; TED; TEE; TEN; VOE; VOL; ZEA; ZED; ZEE; ZOA; ZOL.

4-letter words (1 point): 57

ADZE; AHED; ALOD; ALOE; DATE; DEAN; DEEK; DEER; DEET; DOEK; DOEN; DOER; DOZE; EHED; ETEN; HALO; HAZE; HEAD; HEAT; HEED; HEND; HETE; HOED; HOER; KEEN; KEET; KETA; KETE; LAZE; LAZO; LODE; NEAT; NETE; ODEA; OHED; OVAL; PREE; READ; REAN; REED; REEN; RETE; RHEA; TAED; TANE; TEAD; TEED; TEEK; TEEN; TEER; TEHR; TEND; TREE; TREK; VOLA; ZETA; ZOEA.

5-letter words (2 points): 25

ADOZE; AHEAD; ALOED; DATER; DETER; DOZEN; EANED; EATEN; EATER; ENATE; HAZED; LAZED; LODEN; LOZEN; PHEER; PREED; PREEN; REATE; TEADE; TEAED; TEEND; TREAD; TREED; TREEN; ZOEAE.

6-letter words (3 points): 6

HALOED; HEATED; HEATER; LAZOED; NEATER; REHEAT.

7-letter words (7 points): 4

PHENATE; PREHEAT; PREHEND; PRETEND.