active birth vs accouchement

active birth and accouchement both are nouns.

Word	Noun	Adjective	Verb	Adverb
active birth	Yes	No	No	No
accouchement	Yes	No	No	No

As nouns, accouchement is a hypernym of active birth; that is, accouchement is a word with a broader meaning than active birth:

active birth: childbirth during which the mother is encouraged to be an active participant
accouchement: the parturition process in human beings; having a baby; the process of giving birth to a child

Other hypernyms of active birth include childbearing, childbirth, vaginal birth.

active birth (noun)	accouchement (noun)
childbirth during which the mother is encouraged to be an active participant	the parturition process in human beings; having a baby; the process of giving birth to a child