tunnel vs machine

tunnel and machine both are nouns.

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

tunnel (noun)	machine (noun)
a passageway through or under something, usually underground (especially one for trains or cars)	any mechanical or electrical device that transmits or modifies energy to perform or assist in the performance of human tasks
a hole made by an animal, usually for shelter	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

tunnel (verb)	machine (verb)
force a way through	make by machinery
move through by or as by digging	turn, shape, mold, or otherwise finish by machinery