Nouns

(n)chew, chaw, cud, quid, plug, wada wad of something chewable as tobacco
(n)chew, chewing, mastication, manductionbiting and grinding food in your mouth so it becomes soft enough to swallow

Verbs

(v)chew, masticate, manducate, jawchew (food); to bite and grind with the teeth“He jawed his bubble gum”, “Chew your food and don't swallow it!”, “The cows were masticating the grass”