/ Thesaurus / A Synonyms of atomic number 98 Find synonyms for: Noun1. californium, Cf, atomic number 98, metallic element, metalusage: a radioactive transuranic element; discovered by bombarding curium with alpha particlesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: lyre Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language