/ Thesaurus / A Synonyms of alkaline earth Find synonyms for: Noun1. alkaline earth, alkaline-earth metal, metallic element, metalusage: any of the bivalent metals of group II of the periodic table (calcium or strontium or barium or magnesium or beryllium)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language