WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / A / actinium actinium noun /æktɪniəm/ 4 syllables 8 letters Scrabble 12 WWF 16 Definitions noun a radioactive element of the actinide series; found in uranium ores acatomic number 89 Look “actinium” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →