analgesic vs morphine

analgesic and morphine both are nouns.

Word	Noun	Adjective	Verb	Adverb
analgesic	Yes	Yes	No	No
morphine	Yes	No	No	No

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

analgesic: a medicine used to relieve pain
morphine: an alkaloid narcotic drug extracted from opium; a powerful, habit-forming narcotic used to relieve pain

analgesic (noun)	morphine (noun)
a medicine used to relieve pain	an alkaloid narcotic drug extracted from opium; a powerful, habit-forming narcotic used to relieve pain

analgesic (adjective)	morphine (adjective)
capable of relieving pain