See gluttonous in Webster's New World Roget's A-Z Thesaurus II
adjective
Wanting to eat or drink more than one can reasonably consume:
edacious, greedy, hoggish, piggish, ravenous, voracious. See desire, ingestionHaving an insatiable appetite for an activity or pursuit:
avid, edacious, greedy, omnivorous, rapacious, ravenous, unappeasable, voracious. See desire
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