incarceration vs imprisonment

incarceration and imprisonment both are nouns.

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

As nouns, incarceration and imprisonment are synonyms defined as:

Other synonyms of incarceration include captivity, immurement.

incarceration (noun)	imprisonment (noun)
the state of being imprisoned	the act of confining someone in a prison (or as if in a prison)
	putting someone in prison or in jail as lawful punishment
	the state of being imprisoned