jaw vs munch

jaw and munch both are nouns.

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

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

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

jaw (noun)	munch (noun)
holding device consisting of one or both of the opposing parts of a tool that close to hold an object	a large bite
the part of the skull of a vertebrate that frames the mouth and holds the teeth
the bones of the skull that frame the mouth and serve to open it; the bones that hold the teeth

jaw (verb)	munch (verb)
talk socially without exchanging too much information	crush with the teeth, making a grinding sound
censure severely or angrily
talk incessantly and tiresomely
chew (food); to bite and grind with the teeth