/ Thesaurus / L Synonyms of life imprisonment Find synonyms for: Noun1. life imprisonment, captivity, imprisonment, incarceration, immurementusage: a sentence of imprisonment until deathWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language