first gear vs machine

first gear and machine both are nouns.

Word	Noun	Adjective	Verb	Adverb
first gear	Yes	No	No	No
machine	Yes	No	Yes	No

first gear (noun)	machine (noun)
the lowest forward gear ratio in the gear box of a motor vehicle; used to start a car moving	any mechanical or electrical device that transmits or modifies energy to perform or assist in the performance of human tasks
	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

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