primer vs priming

primer and priming both are nouns.

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

As nouns, primer and priming are synonyms defined as:

primer and priming: any igniter that is used to initiate the burning of a propellant

Other synonyms of primer include fuse, fusee, fuze, fuzee.

As nouns, primer and priming are synonyms defined as:

primer and priming: the first or preliminary coat of paint or size applied to a surface

Other synonyms of primer include flat coat, ground, primer coat, priming coat, undercoat.

primer (noun)	priming (noun)
any igniter that is used to initiate the burning of a propellant	the act of making something ready
the first or preliminary coat of paint or size applied to a surface	any igniter that is used to initiate the burning of a propellant
an introductory textbook	the first or preliminary coat of paint or size applied to a surface