Word:    Find rhymes Find rhymes (advanced) Find near rhymes Find synonyms Find descriptive words Find phrases Find antonyms Find definitions Find related words Find similar sounding words Find similarly spelled words Find homophones Find phrase rhymes Match consonants only Match these letters Find anagrams (unscramble) Definitions of radioactinium: noun:   (physics) The radioactive isotope of actinium, ²²⁷₈₉Ac, having a half-life of 21.7 years (Definitions from Wiktionary) Related words...   Help  Feedback  Privacy  Terms of Use Copyright © 2023