time-fuse vs primer

time-fuse and primer both are nouns.

Word	Noun	Adjective	Verb	Adverb
time-fuse	Yes	No	No	No
primer	Yes	No	No	No

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

time-fuse: a fuse made to burn for a given time (especially to explode a bomb)
primer: any igniter that is used to initiate the burning of a propellant

Other hypernyms of time-fuse include fuse, fusee, fuze, fuzee, priming.

time-fuse (noun)	primer (noun)
a fuse made to burn for a given time (especially to explode a bomb)	any igniter that is used to initiate the burning of a propellant
	the first or preliminary coat of paint or size applied to a surface
	an introductory textbook