Breadcrumb Home > Thesaurus > A Synonyms of adder Find synonyms for: Noun 1. adder, calculator, reckoner, figurer, estimator, computer usage: a person who adds numbers 2. adder, calculator, calculating machine usage: a machine that adds numbers 3. adder, common viper, Vipera berus, viper usage: small terrestrial viper common in northern Eurasia WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of adder (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Did Birds Evolve from Dinosaurs? The Twelve Dancing Princesses Current Events This Week: January 2023 African Americans by the Numbers Andersen's Fairy Tales: Contents The Celtic Twilight: A Teller of Tales ✖ Related Content Daily Word Quiz: hubris Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language