ignition vs plug

ignition and plug both are nouns.

Word	Noun	Adjective	Verb	Adverb
ignition	Yes	No	No	No
plug	Yes	No	Yes	No

ignition (noun)	plug (noun)
the act of setting something on fire	an old or over-worked horse
the mechanism that ignites the fuel in an internal-combustion engine	blockage consisting of an object designed to fill a hole tightly
the process of initiating combustion or catching fire	an upright hydrant for drawing water to use in fighting a fire
	electrical device that fits into the cylinder head of an internal-combustion engine and ignites the gas by means of an electric spark
	an electrical device with two or three pins that is inserted in a socket to make an electrical connection
	blatant or sensational promotion
	a wad of something chewable as tobacco

ignition (verb)	plug (verb)
	persist in working hard
	insert as a plug
	insert a plug into
	replace the center of a coin with a baser metal
	make a plug for; praise the qualities or in order to sell or promote
	deliver a quick blow to
	fill or close tightly with or as if with a plug