WordNet sense 1 (excessively greedy and grasping):

rapacious, ravening

WordNet sense 2 (eager to acquire and possess things especially material possessions or ideas):

acquisitive

WordNet sense 3 (devouring or craving food in great quantities):

edacious, esurient, ravenous, wolfish

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

gluttonous