Breadcrumb Home > Thesaurus > H Synonyms of hornstone Find synonyms for: Noun 1. hornfels, hornstone, metamorphic rock usage: a fine-grained metamorphic rock formed by the action of heat on clay rocks WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of hornstone (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: variegate Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language