captivity vs confinement

captivity and confinement both are nouns.

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

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

captivity (noun)	confinement (noun)
the state of being a slave	the act of restraining of a person's liberty by confining them
the state of being imprisoned	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