side curtain airbag vs car

side curtain airbag and car both are nouns.

Word	Noun	Adjective	Verb	Adverb
side curtain airbag	Yes	No	No	No
car	Yes	No	No	No

side curtain airbag (noun)	car (noun)
a safety device installed in cars that deploys by rapidly inflating to protect the head and provide rollover protection.	a motor vehicle with four wheels; usually propelled by an internal combustion engine
	a wheeled vehicle adapted to the rails of railroad
	where passengers ride up and down
	the compartment that is suspended from an airship and that carries personnel and the cargo and the power plant
	a conveyance for passengers or freight on a cable railway