/ Thesaurus / J Synonyms of jack o' lantern Find synonyms for: Noun1. friar's lantern, ignis fatuus, jack-o'-lantern, will-o'-the-wisp, light, visible light, visible radiationusage: a pale light sometimes seen at night over marshy ground2. jack-o'-lantern, lanternusage: lantern carved from a pumpkinWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language