machine vs petrol engine

machine and petrol engine both are nouns.

Word	Noun	Adjective	Verb	Adverb
machine	Yes	No	Yes	No
petrol engine	Yes	No	No	No

machine (noun)	petrol engine (noun)
any mechanical or electrical device that transmits or modifies energy to perform or assist in the performance of human tasks	an internal-combustion engine that burns gasoline; most automobiles are driven by gasoline engines
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

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