Narcan vs narcotic antagonist

Narcan and narcotic antagonist both are nouns.

Word	Noun	Adjective	Verb	Adverb
Narcan	Yes	No	No	No
narcotic antagonist	Yes	No	No	No

As nouns, narcotic antagonist is a hypernym of Narcan; that is, narcotic antagonist is a word with a broader meaning than Narcan:

Narcan: a potent narcotic antagonist (trade name Narcan) especially effective with morphine
narcotic antagonist: an antagonist used to counteract the effects of narcotics (especially to counteract the depression of respiration)

Narcan (noun)	narcotic antagonist (noun)
a potent narcotic antagonist (trade name Narcan) especially effective with morphine	an antagonist used to counteract the effects of narcotics (especially to counteract the depression of respiration)