internment vs imprisonment

internment and imprisonment both are nouns.

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

As nouns, internment and imprisonment are synonyms defined as:

internment and imprisonment: the act of confining someone in a prison (or as if in a prison)

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

Other hypernyms of internment include captivity, immurement, incarceration.

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