crawlspace vs crawl space

crawlspace and crawl space both are nouns.

Word	Noun	Adjective	Verb	Adverb
crawlspace	Yes	No	No	No
crawl space	Yes	No	No	No

As nouns, crawlspace and crawl space are synonyms defined as:

crawlspace and crawl space: low space beneath a floor of a building; gives workers access to wiring or plumbing

crawlspace (noun)	crawl space (noun)
low space beneath a floor of a building; gives workers access to wiring or plumbing	low space beneath a floor of a building; gives workers access to wiring or plumbing