rumination vs chew

rumination and chew both are nouns.

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

As nouns, chew is a hypernym of rumination; that is, chew is a word with a broader meaning than rumination:

rumination: (of ruminants) chewing (the cud)
chew: biting and grinding food in your mouth so it becomes soft enough to swallow

Other hypernyms of rumination include chewing, manduction, mastication.

rumination (noun)	chew (noun)
regurgitation of small amounts of food; seen in some infants after feeding	biting and grinding food in your mouth so it becomes soft enough to swallow
(of ruminants) chewing (the cud)	a wad of something chewable as tobacco
a calm, lengthy, intent consideration

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