/ Thesaurus / A Synonyms of atomic number 73 Find synonyms for: Noun1. tantalum, Ta, atomic number 73, metallic element, metalusage: a hard grey lustrous metallic element that is highly resistant to corrosion; occurs in niobite and fergusonite and tantaliteWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language