chew vs chomping

chew and chomping both are nouns.

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

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

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

Other hyponyms of chew include gumming, mumbling, rumination.

chew (noun)	chomping (noun)
biting and grinding food in your mouth so it becomes soft enough to swallow	the act of chewing noisily
a wad of something chewable as tobacco

chew (verb)	chomping (verb)
chew (food); to bite and grind with the teeth