birthing vs confinement

birthing and confinement both are nouns.

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

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

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

birthing (noun)	confinement (noun)
the process of giving birth	the act of restraining of a person's liberty by confining them
	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