machine vs roof

machine and roof both are nouns.

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

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

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