Breadcrumb Home > Thesaurus > F Synonyms of four o'clock Find synonyms for: Noun 1. four o'clock, flower usage: any of several plants of the genus Mirabilis having flowers that open in late afternoon WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. TrendingHere are the facts and trivia that people are buzzing about. Biographies: Notable Jewish Religious Leaders Current Events This Week: September 2023 Hispanic Population and the 2010 U.S. Census Preamble of the United Nations Charter The Jewish Calendar ✖ Related Content Daily Word Quiz: oblique Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language