WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / A / atomic number 63 atomic number 63 noun 16 letters Scrabble 20 WWF 26 Definitions noun a bivalent and trivalent metallic element of the rare earth group eueuropium Look “atomic number 63” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →