building vs crawl space

building and crawl space both are nouns.

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

building (noun)	crawl space (noun)
the act of constructing something	low space beneath a floor of a building; gives workers access to wiring or plumbing
the commercial activity involved in repairing old structures or constructing new ones
a structure that has a roof and walls and stands more or less permanently in one place
the occupants of a building