bites (on), champs, chaws, chomps (on), crunches (on), gnaws (on), masticates, nibbles
ruminatesmunches, noshes, snacksconsumes, eats, ingests, swallowsbolts, devours, gobbles (up or down), gorges, gulps, scarfs, scoffs, snacks, wolfsnips, pecks (at), picks (at)gums, mumbles
sinks one's teeth into