eat vs abuse

eat is not a noun while abuse is a noun.

Word	Noun	Adjective	Verb	Adverb
eat	No	No	Yes	No
abuse	Yes	No	Yes	No

As verbs, abuse is a hyponym of eat; that is, abuse is a word with a more specific, narrower meaning than eat:

eat (noun)	abuse (noun)
	improper or excessive use
	cruel or inhumane treatment
	a rude expression intended to offend or hurt

eat (verb)	abuse (verb)
cause to deteriorate due to the action of water, air, or an acid	change the inherent purpose or function of something
take in solid food	use wrongly or improperly or excessively
eat a meal; take a meal	use foul or abusive language towards
take in food; used of animals only	treat badly
use up (resources or materials)
worry or cause anxiety in a persistent way