munch vs jaw

munch and jaw both are nouns.

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

As verbs, jaw is a hypernym of munch; that is, jaw is a word with a broader meaning than munch:

Other hypernyms of munch include chew, manducate, masticate.

munch (noun)	jaw (noun)
a large bite	holding device consisting of one or both of the opposing parts of a tool that close to hold an object
	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

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