desire vs impulse

desire and impulse both are nouns.

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

As nouns, impulse is a hyponym of desire; that is, impulse is a word with a more specific, narrower meaning than desire:

desire (noun)	impulse (noun)
an inclination to want things	the act of applying force suddenly
the feeling that accompanies an unsatisfied state	an impelling force or strength
something that is desired	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

desire (verb)	impulse (verb)
feel or have a desire for; want strongly
express a desire for
expect and wish