red-header vs redheader

red-header and redheader both are nouns.

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

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

Other synonyms of red-header include carrottop, redhead.

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