/ Thesaurus / A Synonyms of all nighter Find synonyms for: Adjective1. nightlong, all-night, overnight, long (vs. short)usage: lasting, open, or operating through the whole night; "a nightlong vigil"; "an all-night drugstore"; "an overnight trip"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language