Home › Words › E › exthorioexthorioexthorio means synonym of thoron (“radon-220”).EtymologyFrom Latin ex (“out of”) + thōriō (“thorium”).nounSynonym of thoron (“radon-220”).Definitions & examples from Wiktionary (CC BY-SA 3.0).Words closest in meaningBy meaning, not spelling — each word's AI semantic fingerprint, nearest first.exactinio 72% match — Synonym of actinon (“radon-219”). vs exthorio →emanon 65% match — Synonym of radon (“chemical element”). vs exthorio →niton 63% match — Former name of radon. vs exthorio →thoric 60% match — relating to, or containing thorium vs exthorio →thorate 59% match — Any oxyanion of thorium; any salt containing such an anion. vs exthorio →dithorium 57% match — Two thorium atoms in a molecule. vs exthorio →excitron 57% match — A kind of mercury pool tube. vs exthorio →extrorsal 57% match — Synonym of extrorse. vs exthorio →