redheader vs red-header

redheader and red-header both are nouns.

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

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

Other synonyms of redheader include carrottop, redhead.

redheader (noun)	red-header (noun)
someone who has red hair	someone who has red hair