pacemaker vs electronic device

pacemaker and electronic device both are nouns.

Word	Noun	Adjective	Verb	Adverb
pacemaker	Yes	No	No	No
electronic device	Yes	No	No	No

As nouns, electronic device is a hypernym of pacemaker; that is, electronic device is a word with a broader meaning than pacemaker:

pacemaker: an implanted electronic device that takes over the function of the natural cardiac pacemaker
electronic device: a device that accomplishes its purpose electronically

pacemaker (noun)	electronic device (noun)
a horse used to set the pace in racing	a device that accomplishes its purpose electronically
an implanted electronic device that takes over the function of the natural cardiac pacemaker
a specialized bit of heart tissue that controls the heartbeat
a leading instance in its field