ACTINIDE Scrabble 11 Words With Friends 13 Definition noun any of a series of radioactive elements with atomic numbers 89 through 103. — synonyms: actinoid, actinon Anagrams of ACTINIDE ctenidiaindicate See all 135 words you can make from ACTINIDE → 8-letter words Words starting with A Words ending with E ← Unscramble different letters