fetoscope vs stethoscope

fetoscope and stethoscope both are nouns.

Word	Noun	Adjective	Verb	Adverb
fetoscope	Yes	No	No	No
stethoscope	Yes	No	No	No

As nouns, stethoscope is a hypernym of fetoscope; that is, stethoscope is a word with a broader meaning than fetoscope:

fetoscope: a stethoscope placed on the pregnant woman's abdomen to listen for the fetal heartbeat
stethoscope: a medical instrument for listening to the sounds generated inside the body

fetoscope (noun)	stethoscope (noun)
a stethoscope placed on the pregnant woman's abdomen to listen for the fetal heartbeat	a medical instrument for listening to the sounds generated inside the body