vaginal birth vs childbirth

vaginal birth and childbirth both are nouns.

Word	Noun	Adjective	Verb	Adverb
vaginal birth	Yes	No	No	No
childbirth	Yes	No	No	No

As nouns, vaginal birth and childbirth are synonyms defined as:

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

Other synonyms of vaginal birth include accouchement, childbearing.

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