/ Thesaurus / A Synonyms of april fools' day Find synonyms for: Noun1. April Fools', April Fools' day, All Fools' day, dayusage: the first day of April which is celebrated by playing practical jokesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: eccentric Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language