confinement vs giving birth

confinement and giving birth both are nouns.

Word	Noun	Adjective	Verb	Adverb
confinement	Yes	No	No	No
giving birth	Yes	No	No	No

As nouns, giving birth is a hypernym of confinement; that is, giving birth 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
giving birth: the process of giving birth

Other hypernyms of confinement include birth, birthing, parturition.

confinement (noun)	giving birth (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