chomping vs chewing

chomping and chewing both are nouns.

Word	Noun	Adjective	Verb	Adverb
chomping	Yes	No	No	No
chewing	Yes	No	No	No

As nouns, chewing is a hypernym of chomping; that is, chewing is a word with a broader meaning than chomping:

chomping: the act of chewing noisily
chewing: biting and grinding food in your mouth so it becomes soft enough to swallow

Other hypernyms of chomping include chew, manduction, mastication.

chomping (noun)	chewing (noun)
the act of chewing noisily	biting and grinding food in your mouth so it becomes soft enough to swallow