WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / R / radiothorium radiothorium noun 12 letters Scrabble 18 WWF 19 Definitions noun radioactive isotope of thorium with mass number 228 thorium-228 Look “radiothorium” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →