pacemaker vs artificial pacemaker

pacemaker and artificial pacemaker both are nouns.

Word	Noun	Adjective	Verb	Adverb
pacemaker	Yes	No	No	No
artificial pacemaker	Yes	No	No	No

As nouns, pacemaker and artificial pacemaker are synonyms defined as:

pacemaker and artificial pacemaker: an implanted electronic device that takes over the function of the natural cardiac pacemaker

pacemaker (noun)	artificial pacemaker (noun)
a horse used to set the pace in racing	an implanted electronic device that takes over the function of the natural cardiac pacemaker
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