WordNet sense 1 ((often followed by `for') ardently or excessively desirous):

avid, esurient, devouring

WordNet sense 2 (having or expressing desire for something):

desirous

WordNet sense 3 (immoderately desirous of acquiring e.g. wealth):

avaricious, covetous, grabby, grasping, prehensile

WordNet sense 4 (given to excess in consumption of especially food or drink):

gluttonous