| Word | Definitions | Synonyms |
|---|---|---|
| arrhythmia | (noun) an abnormal rate of muscle contractions in the heart | Synonyms: cardiac arrhythmia |
| arrhythmic | (adjective) without regard for rhythm | Synonyms: arrhythmical |
| (adjective) lacking a steady rhythm | Synonyms: jerking, jerky | |
| arrhythmical | (adjective) without regard for rhythm | Synonyms: arrhythmic |