foetus vs fetus

foetus and fetus both are nouns.

Word	Noun	Adjective	Verb	Adverb
foetus	Yes	No	No	No
fetus	Yes	No	No	No

As nouns, foetus and fetus are synonyms defined as:

foetus and fetus: an unborn or unhatched vertebrate in the later stages of development showing the main recognizable features of the mature animal

foetus (noun)	fetus (noun)
an unborn or unhatched vertebrate in the later stages of development showing the main recognizable features of the mature animal	an unborn or unhatched vertebrate in the later stages of development showing the main recognizable features of the mature animal