eat vs eat on

eat and eat on both are verbs.

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

As verbs, eat and eat on are synonyms defined as:

eat (verb)	eat on (verb)
cause to deteriorate due to the action of water, air, or an acid	worry or cause anxiety in a persistent way
take in solid food
eat a meal; take a meal
take in food; used of animals only
use up (resources or materials)
worry or cause anxiety in a persistent way