railroad car vs suspension

railroad car and suspension both are nouns.

Word	Noun	Adjective	Verb	Adverb
railroad car	Yes	No	No	No
suspension	Yes	No	No	No

railroad car (noun)	suspension (noun)
a wheeled vehicle adapted to the rails of railroad	the act of suspending something (hanging it from above so it moves freely)
	a temporary debarment (from a privilege or position etc)
	a mechanical system of springs or shock absorbers connecting the wheels and axles to the chassis of a wheeled vehicle
	an interruption in the intensity or amount of something
	temporary cessation or suspension
	a mixture in which fine particles are suspended in a fluid where they are supported by buoyancy
	a time interval during which there is a temporary cessation of something