tocology vs foetology

tocology and foetology both are nouns.

Word	Noun	Adjective	Verb	Adverb
tocology	Yes	No	No	No
foetology	Yes	No	No	No

As nouns, foetology is a hyponym of tocology; that is, foetology is a word with a more specific, narrower meaning than tocology:

tocology: the branch of medicine dealing with childbirth and care of the mother
foetology: the branch of medicine concerned with the fetus in the uterus

Other hyponyms of tocology include fetology, perinatology.

tocology (noun)	foetology (noun)
the branch of medicine dealing with childbirth and care of the mother	the branch of medicine concerned with the fetus in the uterus