redheader vs redhead

redheader and redhead both are nouns.

Word	Noun	Adjective	Verb	Adverb
redheader	Yes	No	No	No
redhead	Yes	No	No	No

As nouns, redheader and redhead are synonyms defined as:

Other synonyms of redheader include carrottop, red-header.

redheader (noun)	redhead (noun)
someone who has red hair	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