backseat vs machine

backseat and machine both are nouns.

Word	Noun	Adjective	Verb	Adverb
backseat	Yes	No	No	No
machine	Yes	No	Yes	No

backseat (noun)	machine (noun)
a seat at the back of a vehicle (especially the seat at the back of an automobile)	any mechanical or electrical device that transmits or modifies energy to perform or assist in the performance of human tasks
a secondary or inferior position or status	a motor vehicle with four wheels; usually propelled by an internal combustion engine
	a device for overcoming resistance at one point by applying force at some other point
	a group that controls the activities of a political party
	an intricate organization that accomplishes its goals efficiently
	an efficient person

backseat (verb)	machine (verb)
	make by machinery
	turn, shape, mold, or otherwise finish by machinery