roof vs machine

roof and machine both are nouns.

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

roof (noun)	machine (noun)
a protective covering that covers or forms the top of a building	any mechanical or electrical device that transmits or modifies energy to perform or assist in the performance of human tasks
protective covering on top of a motor vehicle	a motor vehicle with four wheels; usually propelled by an internal combustion engine
an upper limit on what is allowed	a device for overcoming resistance at one point by applying force at some other point
the inner top surface of a covered area or hollow space	a group that controls the activities of a political party
	an intricate organization that accomplishes its goals efficiently
	an efficient person

roof (verb)	machine (verb)
provide a building with a roof; cover a building with a roof	make by machinery
	turn, shape, mold, or otherwise finish by machinery