caprice vs impulse

caprice and impulse both are nouns.

Word	Noun	Adjective	Verb	Adverb
caprice	Yes	No	No	No
impulse	Yes	No	No	No

As nouns, caprice and impulse are synonyms defined as:

Other synonyms of caprice include whim.

caprice (noun)	impulse (noun)
a sudden desire	the act of applying force suddenly
	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