confinement vs birthing

confinement and birthing both are nouns.

Word	Noun	Adjective	Verb	Adverb
confinement	Yes	No	No	No
birthing	Yes	No	No	No

As nouns, birthing is a hypernym of confinement; that is, birthing is a word with a broader meaning than confinement:

confinement: concluding state of pregnancy; from the onset of contractions to the birth of a child
birthing: the process of giving birth

Other hypernyms of confinement include birth, giving birth, parturition.

confinement (noun)	birthing (noun)
the act of restraining of a person's liberty by confining them	the process of giving birth
the act of keeping something within specified bounds (by force if necessary)
the state of being confined
concluding state of pregnancy; from the onset of contractions to the birth of a child