Ingurgitating means overeat or eat immodestly; is a word that starts and ends with ing.
lots
thinking, playing, running, moving, going, shopping, bringing, taking, making, joking, poking, sleeping, cooking, traveling, mowing, cutting, the list goes on and on.
abusing admitting adjourning accusing accounting accepting accosting acting addressing advising advancing admonishing administering aggravating aggrieving aging adjoining alarming ...