eat on vs worry

eat on is not a noun while worry is a noun.

Word	Noun	Adjective	Verb	Adverb
eat on	No	No	Yes	No
worry	Yes	No	Yes	No

As verbs, worry is a hypernym of eat on; that is, worry is a word with a broader meaning than eat on:

eat on: worry or cause anxiety in a persistent way
worry: disturb the peace of mind of; afflict with mental agitation or distress

Other hypernyms of eat on include vex.

eat on (noun)	worry (noun)
	something or someone that causes anxiety; a source of unhappiness
	a strong feeling of anxiety

eat on (verb)	worry (verb)
worry or cause anxiety in a persistent way	lacerate by biting
	touch or rub constantly
	be worried, concerned, anxious, troubled, or uneasy
	disturb the peace of mind of; afflict with mental agitation or distress
	be concerned with
	be on the mind of