fetoprotein vs foetoprotein

fetoprotein and foetoprotein both are nouns.

Word	Noun	Adjective	Verb	Adverb
fetoprotein	Yes	No	No	No
foetoprotein	Yes	No	No	No

As nouns, fetoprotein and foetoprotein are synonyms defined as:

fetoprotein and foetoprotein: any of several antigens that occur naturally in the fetus and sometimes in adults with cancer

fetoprotein (noun)	foetoprotein (noun)
any of several antigens that occur naturally in the fetus and sometimes in adults with cancer	any of several antigens that occur naturally in the fetus and sometimes in adults with cancer