chew vs munch

chew and munch both are nouns.

Word	Noun	Adjective	Verb	Adverb
chew	Yes	No	Yes	No
munch	Yes	No	Yes	No

As verbs, munch is a hyponym of chew; that is, munch is a word with a more specific, narrower meaning than chew:

Other hyponyms of chew include champ, chomp, champ, gum, mumble, chaw, crunch, gnaw.

chew (noun)	munch (noun)
biting and grinding food in your mouth so it becomes soft enough to swallow	a large bite
a wad of something chewable as tobacco

chew (verb)	munch (verb)
chew (food); to bite and grind with the teeth	crush with the teeth, making a grinding sound