pecker vs beak

pecker and beak both are nouns.

Word	Noun	Adjective	Verb	Adverb
pecker	Yes	No	No	No
beak	Yes	No	Yes	No

As nouns, pecker and beak are synonyms defined as:

Other synonyms of pecker include bill, neb, nib.

pecker (noun)	beak (noun)
bird with strong claws and a stiff tail adapted for climbing and a hard chisel-like bill for boring into wood for insects	horny projecting mouth of a bird
horny projecting mouth of a bird	beaklike mouth of animals other than birds (e.g., turtles)
obscene terms for penis	informal terms for the nose
	a beaklike, tapering tip on certain plant structures

pecker (verb)	beak (verb)
	hit lightly with a picking motion