eat vs peck at

eat and peck at both are verbs.

Word	Noun	Adjective	Verb	Adverb
eat	No	No	Yes	No
peck at	No	No	Yes	No

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

eat (verb)	peck at (verb)
cause to deteriorate due to the action of water, air, or an acid	eat like a bird
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