home page vs homepage

home page and homepage both are nouns.

Word	Noun	Adjective	Verb	Adverb
home page	Yes	No	No	No
homepage	Yes	No	No	No

As nouns, home page and homepage are synonyms defined as:

home page and homepage: the opening page of a web site; also, the first page opened when a web browser is launched (default or start-up page)

home page (noun)	homepage (noun)
the opening page of a web site; also, the first page opened when a web browser is launched (default or start-up page)	the opening page of a web site; also, the first page opened when a web browser is launched (default or start-up page)