/ Thesaurus / A Synonyms of atomic number 36 Find synonyms for: Noun1. krypton, Kr, atomic number 36, chemical element, element, noble gas, inert gas, argononusage: a colorless element that is one of the six inert gasses; occurs in trace amounts in airWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: labyrinth Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language