/ Thesaurus / F Synonyms of fourth power Find synonyms for: Noun1. biquadrate, biquadratic, quartic, fourth power, numberusage: an algebraic equation of the fourth degreeWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: malady Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language