primer vs lighter

primer and lighter both are nouns.

Word	Noun	Adjective	Verb	Adverb
primer	Yes	No	No	No
lighter	Yes	No	Yes	No

As nouns, lighter is a hypernym of primer; that is, lighter is a word with a broader meaning than primer:

Other hypernyms of primer include igniter, ignitor, light.

primer (noun)	lighter (noun)
any igniter that is used to initiate the burning of a propellant	a device for lighting or igniting fuel or charges or fires
the first or preliminary coat of paint or size applied to a surface	a flatbottom boat for carrying heavy loads (especially on canals)
an introductory textbook	a substance used to ignite or kindle a fire

primer (verb)	lighter (verb)
	transport in a flatbottom boat