Breadcrumb Home > Thesaurus > H Synonyms of hydrogen Find synonyms for: Noun 1. hydrogen, H, atomic number 1, chemical element, element, gas usage: a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of hydrogen (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: panache Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language