redheaded woodpecker vs redhead

redheaded woodpecker and redhead both are nouns.

Word	Noun	Adjective	Verb	Adverb
redheaded woodpecker	Yes	No	No	No
redhead	Yes	No	No	No

As nouns, redheaded woodpecker and redhead are synonyms defined as:

redheaded woodpecker and redhead: black-and-white North American woodpecker having a red head and neck

Other synonyms of redheaded woodpecker include Melanerpes erythrocephalus.

redheaded woodpecker (noun)	redhead (noun)
black-and-white North American woodpecker having a red head and neck	black-and-white North American woodpecker having a red head and neck
	North American diving duck with a grey-and-black body and reddish-brown head
	someone who has red hair