/ Thesaurus / E Synonyms of element 104 Find synonyms for: Noun1. rutherfordium, Rf, unnilquadium, Unq, element 104, atomic number 104, chemical element, elementusage: a radioactive transuranic element which has been synthesizedWordNet 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