Solutions :

3-letter words (1 point): 48

AAL; ADO; AGA; AGE; AGO; ALA; ALE; DAD; DAE; DAG; DAL; DEE; DEG; DEL; DEN; DOE; DOG; DUO; EAU; EEN; EGO; ELD; ENE; ENG; GAD; GAE; GAL; GAU; GED; GEE; GEN; GEO; GOA; GOD; GOE; LAD; LAG; LEA; LED; NED; NEE; NEG; ODA; ODE; OLD; OLE; OUD; UDO.

4-letter words (1 point): 47

AGED; AGEE; AGEN; ALAE; ALOE; DADA; DADO; DAGO; DALE; DAUD; DEAD; DEAL; DEEN; DELO; DENE; DOEN; DOGE; DUAD; DUAL; EALE; EDGE; EGAD; EGAL; GADE; GAED; GAEN; GALA; GALE; GAOL; GAUD; GEAL; GEED; GENE; GOAD; GOAL; LADE; LAUD; LEAD; LOAD; NEAL; NEED; ODAL; ODEA; OGEE; OLEA; OLEO; UDAL.

5-letter words (2 points): 9

ADAGE; AGENE; ALOED; AUDAD; DALED; GALEA; GEODE; LADEN; LEDGE.

6-letter words (3 points): 10

AOUDAD; DAEDAL; ENGAOL; GAOLED; GEALED; GOALED; LEADEN; LOADEN; NEALED; OGDOAD.

8-letter word (11 points): 1

ENGAOLED.