morphine vs opiate

morphine and opiate both are nouns.

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

As nouns, opiate is a hypernym of morphine; that is, opiate is a word with a broader meaning than morphine:

morphine: an alkaloid narcotic drug extracted from opium; a powerful, habit-forming narcotic used to relieve pain
opiate: a narcotic drug that contains opium or an opium derivative

Other hypernyms of morphine include analgesic, anodyne, pain pill, painkiller.

morphine (noun)	opiate (noun)
an alkaloid narcotic drug extracted from opium; a powerful, habit-forming narcotic used to relieve pain	a narcotic drug that contains opium or an opium derivative