childbirth vs parturition

childbirth and parturition both are nouns.

Word	Noun	Adjective	Verb	Adverb
childbirth	Yes	No	No	No
parturition	Yes	No	No	No

As nouns, parturition is a hypernym of childbirth; that is, parturition is a word with a broader meaning than childbirth:

childbirth: the parturition process in human beings; having a baby; the process of giving birth to a child
parturition: the process of giving birth

Other hypernyms of childbirth include birth, birthing, giving birth.

childbirth (noun)	parturition (noun)
the parturition process in human beings; having a baby; the process of giving birth to a child	the process of giving birth