foldout vs gatefold

foldout and gatefold both are nouns.

Word	Noun	Adjective	Verb	Adverb
foldout	Yes	No	No	No
gatefold	Yes	No	No	No

As nouns, foldout and gatefold are synonyms defined as:

foldout and gatefold: an oversize page that is folded in to a book or magazine

foldout (noun)	gatefold (noun)
an oversize page that is folded in to a book or magazine	an oversize page that is folded in to a book or magazine