impulse vs electrical discharge

impulse and electrical discharge both are nouns.

Word	Noun	Adjective	Verb	Adverb
impulse	Yes	No	No	No
electrical discharge	Yes	No	No	No

As nouns, electrical discharge is a hypernym of impulse; that is, electrical discharge is a word with a broader meaning than impulse:

impulse (noun)	electrical discharge (noun)
the act of applying force suddenly	a discharge of electricity
an impelling force or strength
the electrical discharge that travels along a nerve fiber
(electronics) a sharp transient wave in the normal electrical state (or a series of such transients)
a sudden desire
an instinctive motive