chomping vs mastication

chomping and mastication both are nouns.

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

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

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

Other hypernyms of chomping include chew, chewing, manduction.

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