mastication vs chew

mastication and chew both are nouns.

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

As nouns, mastication and chew are synonyms defined as:

mastication and chew: biting and grinding food in your mouth so it becomes soft enough to swallow

Other synonyms of mastication include chewing, manduction.

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

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