internment vs incarceration

internment and incarceration both are nouns.

Word	Noun	Adjective	Verb	Adverb
internment	Yes	No	No	No
incarceration	Yes	No	No	No

As nouns, incarceration is a hypernym of internment; that is, incarceration is a word with a broader meaning than internment:

Other hypernyms of internment include captivity, immurement, imprisonment.

internment (noun)	incarceration (noun)
the act of confining someone in a prison (or as if in a prison)	the state of being imprisoned
placing private property in the custody of an officer of the law
confinement during wartime