Difference between Nag and Peck

Nag

Part of speech: noun

Definition: A small horse; a pony. An old useless horse. One who nags.

Part of speech: verb

Definition: To bother with persistent memories. To repeatedly complain about often insignificant matters. To act inappropriately in the eyes of peers, to backstab, to verbally abuse.

Example sentence: I write to relieve an intellectual itch. I stumble across a hitherto neglected set of events, transformations, characters, or source materials from the past, and they nag at me until I make sense of them in words. But I also write to seduce and to make my readers think.

Peck

Part of speech: noun

Definition: One quarter of a bushel; a dry measure of eight quarts.A great deal; a large or excessive quantity.A short kiss.

Part of speech: verb

Definition: To strike or pierce with the beak or bill (of a bird) or similar instrument.To do something in small, intermittent pieces.To type by searching for each key individually.To type in general.