ARRHYTHMIA /eɪˈɹɪðmɪə/ Scrabble 21 Words With Friends 19 Definition noun an abnormal rate of muscle contractions in the heart. — synonyms: cardiac_arrhythmia See all 115 words you can make from ARRHYTHMIA → 10-letter words Words starting with A Words ending with A ← Unscramble different letters