redhead vs red-header

redhead and red-header both are nouns.

Word	Noun	Adjective	Verb	Adverb
redhead	Yes	No	No	No
red-header	Yes	No	No	No

As nouns, redhead and red-header are synonyms defined as:

Other synonyms of redhead include carrottop, redheader.

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