fetoscope vs foetoscope

fetoscope and foetoscope both are nouns.

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

As nouns, fetoscope and foetoscope are synonyms defined as:

fetoscope and foetoscope: a stethoscope placed on the pregnant woman's abdomen to listen for the fetal heartbeat

fetoscope (noun)	foetoscope (noun)
a stethoscope placed on the pregnant woman's abdomen to listen for the fetal heartbeat	a stethoscope placed on the pregnant woman's abdomen to listen for the fetal heartbeat