spreadhead vs spread head

spreadhead and spread head both are nouns.

Word	Noun	Adjective	Verb	Adverb
spreadhead	Yes	No	No	No
spread head	Yes	No	No	No

As nouns, spreadhead and spread head are synonyms defined as:

spreadhead and spread head: two facing pages of a book or other publication

Other synonyms of spreadhead include facing pages, spread.

spreadhead (noun)	spread head (noun)
two facing pages of a book or other publication	two facing pages of a book or other publication