death wish vs impulse

death wish and impulse both are nouns.

Word	Noun	Adjective	Verb	Adverb
death wish	Yes	No	No	No
impulse	Yes	No	No	No

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

Other hypernyms of death wish include urge.

death wish (noun)	impulse (noun)
(psychoanalysis) an unconscious urge to die	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