Crossword clues for the word: ISOTOPE The word ISOTOPE has appeared as an answer to at least 54 crossword clues on different crossword puzzles. Crossword clues for ISOTOPE Showing 51 to 54 of 54 results Clue(s) Uranium-235, for one Uranium-238, e.g. Varied form of element Word in atomic terminology. « Previous Next » 1 2